<SUBMISSION>
<ACCESSION-NUMBER>0001072613-03-000194
<TYPE>SC 13G/A
<PUBLIC-DOCUMENT-COUNT>1
<FILING-DATE>20030210
<GROUP-MEMBERS>C. RICHARD KRAMLICH
<GROUP-MEMBERS>CHARLES W. NEWHALL III
<GROUP-MEMBERS>CORNELIUS C. BOND, JR.
<GROUP-MEMBERS>DONALD L. MURFIN
<GROUP-MEMBERS>NANCY L. DORMAN
<GROUP-MEMBERS>NEA CHEMICALS AND MATERIALS PARTNERS, L.P.
<GROUP-MEMBERS>THOMAS C. MCCONNELL
<GROUP-MEMBERS>THOMAS R. BARUCH
<SUBJECT-COMPANY>
<COMPANY-DATA>
<CONFORMED-NAME>AEROGEN INC
<CIK>0001039160
<ASSIGNED-SIC>3841
<IRS-NUMBER>330488580
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>SC 13G/A
<ACT>34
<FILE-NUMBER>005-60561
<FILM-NUMBER>03547208
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>1310 CORONADO DR
<CITY>SANTA CLARA
<STATE>CA
<ZIP>95054
<PHONE>4085432400
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>1310 ORLEANS DRIVE
<CITY>SUNNYVALE
<STATE>CA
<ZIP>94089
</MAIL-ADDRESS>
</SUBJECT-COMPANY>
<FILED-BY>
<COMPANY-DATA>
<CONFORMED-NAME>CHEMICALS & MATERIALS ENTERPRISE ASSOCIATES L P
<CIK>0000859043
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>SC 13G/A
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>ONE CLEVELAND CENTER SUITE 2700
<CITY>CLEVELAND
<STATE>OH
<ZIP>44114
<PHONE>2168614800
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>ONE CLEVELAND CENTER SUITE 2700
<CITY>CLEVELAND
<STATE>OH
<ZIP>44114
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>CHEMICALS AND MATERIALS ENTERPRISE ASSOCIATES LTD PARTN
<DATE-CHANGED>19900510
</FORMER-COMPANY>
</FILED-BY>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>sc13g_11728b.txt
<DESCRIPTION>SCHEDULE 13G/A - AEROGEN, INC.
<TEXT>
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                  SCHEDULE 13G
                                 (RULE 13D-102)

    INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13D-1(B)
      (C), AND (D) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13D-2(B)


                               (AMENDMENT NO. 2 )*


                                  Aerogen, Inc.
--------------------------------------------------------------------------------
                                (Name of Issuer)

                         Common Stock, $0.001 par value
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    00777910
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                                December 31, 2002
--------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)

     Check the appropriate box to designate the rule pursuant to which this
Schedule is filed:

               [ ]  Rule 13d-1(b)
               [ ]  Rule 13d-1(c)
               [X]  Rule 13d-1(d)

     *The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which would
alter the disclosures provided in a prior cover page.

     The information required in the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act but shall be subject to all other provisions of the Act (however, see
the Notes).
================================================================================

                               Page 1 of 19 pages
<PAGE>
==================                                                 =============
CUSIP NO. 00777910                    13G                          PAGE 2 OF 19
==================                                                 =============

================================================================================
  1     NAMES OF REPORTING PERSONS

        Chemicals and Materials Enterprise Associates, Limited Partnership
------- ------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
                                                                         (a) [_]
                                                                         (b) [_]
------- ------------------------------------------------------------------------
  3     SEC USE ONLY


------- ------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        Delaware
------- ------------------------------------------------------------------------
                     5     SOLE VOTING POWER

                           0 shares
  NUMBER OF        ------- -----------------------------------------------------
   SHARES            6     SHARED VOTING POWER
BENEFICIALLY
  OWNED BY                 1,299,144 shares
    EACH           ------- -----------------------------------------------------
  REPORTING          7     SOLE DISPOSITIVE POWER
   PERSON
    WITH                   0 shares
                   ------- -----------------------------------------------------
                     8     SHARED DISPOSITIVE POWER

                           1,299,144 shares
------- ------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,299,144 shares
------- ------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
        (SEE INSTRUCTIONS)   [_]

------- ------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        6.4%
------- ------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

        PN
================================================================================
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

                               Page 2 of 19 pages
<PAGE>
==================                                                 =============
CUSIP NO. 00777910                    13G                          PAGE 3 OF 19
==================                                                 =============

================================================================================
  1     NAMES OF REPORTING PERSONS

        NEA Chemicals and Materials Partners, Limited Partnership
------- ------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
                                                                         (a) [_]
                                                                         (b) [_]
------- ------------------------------------------------------------------------
  3     SEC USE ONLY


------- ------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        Delaware
------- ------------------------------------------------------------------------
                     5     SOLE VOTING POWER

                           0 shares
  NUMBER OF        ------- -----------------------------------------------------
   SHARES            6     SHARED VOTING POWER
BENEFICIALLY
  OWNED BY                 1,299,144 shares
    EACH           ------- -----------------------------------------------------
  REPORTING          7     SOLE DISPOSITIVE POWER
   PERSON
    WITH                   0 shares
                   ------- -----------------------------------------------------
                     8     SHARED DISPOSITIVE POWER

                           1,299,144 shares
------- ------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,299,144 shares
------- ------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
        (SEE INSTRUCTIONS)   [_]

------- ------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        6.4%
------- ------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

        PN
================================================================================
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

                               Page 3 of 19 pages
<PAGE>
==================                                                 =============
CUSIP NO. 00777910                    13G                          PAGE 4 OF 19
==================                                                 =============

================================================================================
  1     NAMES OF REPORTING PERSONS

        Cornelius C. Bond, Jr.
------- ------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
                                                                         (a) [_]
                                                                         (b) [_]
------- ------------------------------------------------------------------------
  3     SEC USE ONLY


------- ------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        United States
------- ------------------------------------------------------------------------
                     5     SOLE VOTING POWER

                           0 shares
  NUMBER OF        ------- -----------------------------------------------------
   SHARES            6     SHARED VOTING POWER
BENEFICIALLY
  OWNED BY                 1,299,144 shares
    EACH           ------- -----------------------------------------------------
  REPORTING          7     SOLE DISPOSITIVE POWER
   PERSON
    WITH                   0 shares
                   ------- -----------------------------------------------------
                     8     SHARED DISPOSITIVE POWER

                           1,299,144 shares
------- ------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,299,144 shares
------- ------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
        (SEE INSTRUCTIONS)   [_]

------- ------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        6.4%
------- ------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

        IN
================================================================================
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

                               Page 4 of 19 pages
<PAGE>
==================                                                 =============
CUSIP NO. 00777910                    13G                          PAGE 5 OF 19
==================                                                 =============

================================================================================
  1     NAMES OF REPORTING PERSONS

        Nancy L. Dorman
------- ------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
                                                                         (a) [_]
                                                                         (b) [_]
------- ------------------------------------------------------------------------
  3     SEC USE ONLY


------- ------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        United States
------- ------------------------------------------------------------------------
                     5     SOLE VOTING POWER

                           0 shares
  NUMBER OF        ------- -----------------------------------------------------
   SHARES            6     SHARED VOTING POWER
BENEFICIALLY
  OWNED BY                 1,299,144 shares
    EACH           ------- -----------------------------------------------------
  REPORTING          7     SOLE DISPOSITIVE POWER
   PERSON
    WITH                   0 shares
                   ------- -----------------------------------------------------
                     8     SHARED DISPOSITIVE POWER

                           1,299,144 shares
------- ------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,299,144 shares
------- ------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
        (SEE INSTRUCTIONS)   [_]

------- ------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        6.4%
------- ------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

        IN
================================================================================
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

                               Page 5 of 19 pages
<PAGE>
==================                                                 =============
CUSIP NO. 00777910                    13G                          PAGE 6 OF 19
==================                                                 =============

================================================================================
  1     NAMES OF REPORTING PERSONS

        C. Richard Kramlich
------- ------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
                                                                         (a) [_]
                                                                         (b) [_]
------- ------------------------------------------------------------------------
  3     SEC USE ONLY


------- ------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        United States
------- ------------------------------------------------------------------------
                     5     SOLE VOTING POWER

                           0 shares
  NUMBER OF        ------- -----------------------------------------------------
   SHARES            6     SHARED VOTING POWER
BENEFICIALLY
  OWNED BY                 1,299,144 shares
    EACH           ------- -----------------------------------------------------
  REPORTING          7     SOLE DISPOSITIVE POWER
   PERSON
    WITH                   0 shares
                   ------- -----------------------------------------------------
                     8     SHARED DISPOSITIVE POWER

                           1,299,144 shares
------- ------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,299,144 shares
------- ------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
        (SEE INSTRUCTIONS)   [_]

------- ------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        6.4%
------- ------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

        IN
================================================================================
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

                               Page 6 of 19 pages
<PAGE>
==================                                                 =============
CUSIP NO. 00777910                    13G                          PAGE 7 OF 19
==================                                                 =============

================================================================================
  1     NAMES OF REPORTING PERSONS

        Thomas C. McConnell
------- ------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
                                                                         (a) [_]
                                                                         (b) [_]
------- ------------------------------------------------------------------------
  3     SEC USE ONLY


------- ------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        United States
------- ------------------------------------------------------------------------
                     5     SOLE VOTING POWER

                           0 shares
  NUMBER OF        ------- -----------------------------------------------------
   SHARES            6     SHARED VOTING POWER
BENEFICIALLY
  OWNED BY                 1,299,144 shares
    EACH           ------- -----------------------------------------------------
  REPORTING          7     SOLE DISPOSITIVE POWER
   PERSON
    WITH                   0 shares
                   ------- -----------------------------------------------------
                     8     SHARED DISPOSITIVE POWER

                           1,299,144 shares
------- ------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,299,144 shares
------- ------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
        (SEE INSTRUCTIONS)   [_]

------- ------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        6.4%
------- ------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

        IN
================================================================================
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

                               Page 7 of 19 pages
<PAGE>
==================                                                 =============
CUSIP NO. 00777910                    13G                          PAGE 8 OF 19
==================                                                 =============

================================================================================
  1     NAMES OF REPORTING PERSONS

        Charles W. Newhall III
------- ------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
                                                                         (a) [_]
                                                                         (b) [_]
------- ------------------------------------------------------------------------
  3     SEC USE ONLY


------- ------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        United States
------- ------------------------------------------------------------------------
                     5     SOLE VOTING POWER

                           0 shares
  NUMBER OF        ------- -----------------------------------------------------
   SHARES            6     SHARED VOTING POWER
BENEFICIALLY
  OWNED BY                 1,299,144 shares
    EACH           ------- -----------------------------------------------------
  REPORTING          7     SOLE DISPOSITIVE POWER
   PERSON
    WITH                   0 shares
                   ------- -----------------------------------------------------
                     8     SHARED DISPOSITIVE POWER

                           1,299,144 shares
------- ------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,299,144 shares
------- ------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
        (SEE INSTRUCTIONS)   [_]

------- ------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        6.4%
------- ------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

        IN
================================================================================
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

                               Page 8 of 19 pages
<PAGE>
==================                                                 =============
CUSIP NO. 00777910                    13G                          PAGE 9 OF 19
==================                                                 =============

================================================================================
  1     NAMES OF REPORTING PERSONS

        Thomas R. Baruch
------- ------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
                                                                         (a) [_]
                                                                         (b) [_]
------- ------------------------------------------------------------------------
  3     SEC USE ONLY


------- ------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        United States
------- ------------------------------------------------------------------------
                     5     SOLE VOTING POWER

                           13,611 shares
  NUMBER OF        ------- -----------------------------------------------------
   SHARES            6     SHARED VOTING POWER
BENEFICIALLY
  OWNED BY                 1,447,292 shares
    EACH           ------- -----------------------------------------------------
  REPORTING          7     SOLE DISPOSITIVE POWER
   PERSON
    WITH                   13,611 shares
                   ------- -----------------------------------------------------
                     8     SHARED DISPOSITIVE POWER

                           1,447,292 shares
------- ------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,460,903 shares
------- ------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
        (SEE INSTRUCTIONS)   [_]

------- ------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        7.2%
------- ------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

        IN
================================================================================
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

                               Page 9 of 19 pages
<PAGE>
==================                                                 =============
CUSIP NO. 00777910                    13G                          PAGE 10 OF 19
==================                                                 =============

================================================================================
  1     NAMES OF REPORTING PERSONS

        Donald L. Murfin
------- ------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
                                                                         (a) [_]
                                                                         (b) [_]
------- ------------------------------------------------------------------------
  3     SEC USE ONLY


------- ------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        United States
------- ------------------------------------------------------------------------
                     5     SOLE VOTING POWER

                           0 shares
  NUMBER OF        ------- -----------------------------------------------------
   SHARES            6     SHARED VOTING POWER
BENEFICIALLY
  OWNED BY                 1,299,144 shares
    EACH           ------- -----------------------------------------------------
  REPORTING          7     SOLE DISPOSITIVE POWER
   PERSON
    WITH                   0 shares
                   ------- -----------------------------------------------------
                     8     SHARED DISPOSITIVE POWER

                           1,299,144 shares
------- ------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,299,144 shares
------- ------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
        (SEE INSTRUCTIONS)   [_]

------- ------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        6.4%
------- ------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

        IN
================================================================================
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

                               Page 10 of 19 pages
<PAGE>

Item 1(a).     NAME OF ISSUER: Aerogen, Inc.
               --------------

Item 1(b).     ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:
               -----------------------------------------------
               2071 Stierlin Court
               Mountain View, CA 94043

Item 2(a).     NAMES OF PERSONS FILING:
               -----------------------
               Chemicals and Materials Enterprise Associates, Limited
               Partnership ("CMEA"), NEA Chemicals and Materials Partners,
               Limited Partnership ("CMEA Partners"), which is a general partner
               of CMEA, and Cornelius C. Bond, Jr. ("Bond"), Nancy L. Dorman
               ("Dorman"), C. Richard Kramlich ("Kramlich"), Thomas C. McConnell
               ("McConnell") and Charles W. Newhall III ("Newhall" and
               collectively with Bond, Dorman, Kramlich and McConnell the
               "General Partners"), and Thomas R. Baruch ("Baruch") and Donald
               L. Murfin ("Murfin"). The General Partners are individual general
               partners of CMEA Partners. Baruch and Murfin are individual
               general partners of CMEA. The persons named in this paragraph are
               referred to individually herein as a "Reporting Person" and
               collectively as the "Reporting Persons."

Item 2(b).     ADDRESSES OF PRINCIPAL BUSINESS OFFICES OR, IF NONE, RESIDENCES:
               ---------------------------------------------------------------
               The address of the principal business office of CMEA Partners,
               Bond, Dorman, Murfin and Newhall is New Enterprise Associates,
               1119 St. Paul Street, Baltimore, Maryland 21202. The address of
               the principal business office of Kramlich and McConnell is New
               Enterprise Associates, 2490 Sand Hill Road, Menlo Park,
               California 94025. The address of the principal business office of
               CMEA and Baruch is One Embarcadero Center, Suite 3250, San
               Francisco, CA 94111.

Item 2(c).     CITIZENSHIP:
               -----------
               Each of CMEA and CMEA Partners is a limited partnership organized
               under the laws of the State of Delaware. Each of the General
               Partners, Baruch and Murfin is a United States citizen.

Item 2(d).     TITLE OF CLASS OF SECURITIES:
               ----------------------------
               Common Stock, $0.001 par value ("Common Stock").

Item 2(e).     CUSIP NUMBER: 00777910.
               ------------

Item 4.        OWNERSHIP.
               ---------
               (a) Amount Beneficially Owned: CMEA is the record owner of
                   1,299,144 shares of Common Stock as of December 31, 2002 (the
                   "CMEA Shares"). As a general partner of CMEA, CMEA Partners
                   may be deemed to own beneficially the CMEA Shares. As
                   individual general partners of CMEA Partners, Bond, Dorman,
                   Kramlich, McConnell and Newhall may be deemed to own
                   beneficially the CMEA Shares. As a general partner of CMEA,
                   Murfin may be deemed to own beneficially the CMEA Shares.
                   CMEA Life Sciences Fund, L.P. ("Life Sciences") is the record
                   owner of 148,148 shares of Common Stock as of December 31,
                   2002 (the "Life Sciences Shares"). As a general partner of
                   CMEA Life Sciences Management, L.P., the general partner of
                   Life Sciences, Baruch may be deemed to own beneficially the
                   Life Sciences Shares. Baruch is the record owner of options
                   to purchase 13,611 shares of Common Stock (the "Option
                   Shares"), which options will be exercisable within 60 days of
                   December 31, 2002. As a general partner of CMEA, Baruch may
                   be deemed to own beneficially the CMEA Shares, as well as the
                   Life Sciences Shares and the Option Shares, for a total of
                   1,460,903 shares of Common Stock.

                               Page 11 of 19 pages
<PAGE>

               (b) Percent of Class: Each of the Reporting Persons other than
                   Baruch: 6.4%. Baruch: 7.2%. The foregoing percentages are
                   calculated based upon the 20,403,746 shares of Common Stock
                   reported to be outstanding as of October 31, 2002, as
                   adjusted pursuant to Rule 13d-3(d)(1), to the extent
                   applicable.

               (c) Number of shares as to which such person has:

                  (i)  sole power to vote or to direct the vote: 0 shares of
                       Common Stock for each Reporting Person other than Baruch.
                       13,611 shares of Common Stock for Baruch.

                 (ii)  shared power to vote or to direct the vote: 1,299,144
                       shares of Common Stock for each Reporting Person other
                       than Baruch. 1,447,292 shares of Common Stock for Baruch.

                (iii)  sole power to dispose or direct the disposition of: 0
                       shares of Common Stock for each Reporting Person other
                       than Baruch. 13,611 shares of Common Stock for Baruch.

                 (iv)  shared power to dispose or direct the disposition of:
                       1,299,144 shares of Common Stock for each Reporting
                       Person other than Baruch. 1,447,292 shares of Common
                       Stock for Baruch.

               Each Reporting Person disclaims beneficial ownership of such
               shares of Common Stock except for the shares, if any, such
               Reporting Person holds of record.

Item 5.        Ownership of Five Percent or Less of a Class.  Not Applicable.
               --------------------------------------------
               ALL OTHER ITEMS REPORTED ON THE SCHEDULE 13G DATED AS OF FEBRUARY
               14, 2002 AND FILED ON BEHALF OF THE REPORTING PERSONS WITH
               RESPECT TO THE COMMON STOCK OF AEROGEN, INC. REMAIN UNCHANGED.

                               Page 12 of 19 pages
<PAGE>

                                    SIGNATURE

     After reasonable inquiry and to the best of its knowledge and belief, each
of the undersigned certifies that the information set forth in this statement is
true, complete and correct.

Date: February 4, 2003


CHEMICALS AND MATERIALS ENTERPRISE ASSOCIATES, LIMITED PARTNERSHIP

By: NEA Chemicals and Materials Partners, Limited Partnership

         By:               *
             ----------------------------
              Charles W. Newhall III
              General Partner

NEA CHEMICALS AND MATERIALS PARTNERS, LIMITED PARTNERSHIP

By:                 *
    --------------------------------
     Charles W. Newhall III
     General Partner


               *
-------------------------------
Thomas R. Baruch


               *
-------------------------------
Cornelius C. Bond, Jr.


               *
-------------------------------
C. Richard Kramlich


               *
-------------------------------
Thomas C. McConnell


               *
-------------------------------
Donald L. Murfin


                               Page 13 of 19 pages
<PAGE>



               *
-------------------------------
Charles W. Newhall III



                                         /s/ Nancy L. Dorman
                                         ------------------------------------
                                         Nancy L. Dorman, in her individual
                                         capacity and as Attorney-in-Fact


--------------------------------------------------------------------------------
* This Schedule 13G was executed by Nancy L. Dorman pursuant to a Power of
  Attorney filed with the Securities and Exchange Commission on February 13,
  1992 in connection with a Schedule 13G for Advanced Interventional Systems
  Inc., which Power of Attorney is incorporated herein by reference and is
  attached hereto as Exhibit 2.



















                               Page 14 of 19 pages
<PAGE>

                                                                       Exhibit 1
                                                                       ---------

                                    AGREEMENT

     Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, the
undersigned hereby agree that only one statement containing the information
required by Schedule 13G need be filed with respect to the ownership by each of
the undersigned of shares of Common Stock of Aerogen, Inc.

Date: February 4, 2003


CHEMICALS AND MATERIALS ENTERPRISE ASSOCIATES, LIMITED PARTNERSHIP

By: NEA Chemicals and Materials Partners, Limited Partnership

         By:               *
             ----------------------------
              Charles W. Newhall III
              General Partner

NEA CHEMICALS AND MATERIALS PARTNERS, LIMITED PARTNERSHIP

By:                 *
    --------------------------------
     Charles W. Newhall III
     General Partner


               *
-------------------------------
Thomas R. Baruch


               *
-------------------------------
Cornelius C. Bond, Jr.


               *
-------------------------------
C. Richard Kramlich


               *
-------------------------------
Thomas C. McConnell


               *
-------------------------------
Donald L. Murfin


                               Page 15 of 19 pages
<PAGE>



               *
-------------------------------
Charles W. Newhall III



                                         /s/ Nancy L. Dorman
                                         ------------------------------------
                                         Nancy L. Dorman, in her individual
                                         capacity and as Attorney-in-Fact


--------------------------------------------------------------------------------
* This Schedule 13G was executed by Nancy L. Dorman pursuant to a Power of
  Attorney filed with the Securities and Exchange Commission on February 13,
  1992 in connection with a Schedule 13G for Advanced Interventional Systems
  Inc., which Power of Attorney is incorporated herein by reference and is
  attached hereto as Exhibit 2.
















                               Page 16 of 19 pages
<PAGE>

                                                                       Exhibit 2
                                                                       ---------

                                POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below hereby constitutes and appoints Nancy L. Dorman and Charles W. Newhall
III, and each of them, with full power to act without the other, his true and
lawful attorney-in-fact, with full power of substitution, to sign any and all
instruments, certificates and documents that may be necessary, desirable or
appropriate to be executed on behalf of himself as an individual or in his
capacity as a general partner of any partnership, pursuant to section 13 or 16
of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and any
and all regulations promulgated thereunder, and to file the same, with all
exhibits thereto, and any other documents in connection therewith, with the
Securities and Exchange Commission, and with any other entity when and if such
is mandated by the Exchange Act or by the By-laws of the National Association of
Securities Dealers, Inc., granting unto said attorney-in-fact full power and
authority to do and perform each and every act and thing necessary, desirable or
appropriate, fully to all intents and purposes as he might or could do in
person, thereby ratifying and confirming all that said attorney-in-fact, or his
substitutes, may lawfully do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 23rd
day of April, 1991.


                                         /s/ Raymond L. Bank
                                         ------------------------------------
                                         Raymond L. Bank


                                         /s/ Thomas R. Baruch
                                         ------------------------------------
                                         Thomas R. Baruch


                                         /s/ Cornelius C. Bond, Jr.
                                         ------------------------------------
                                         Cornelius C. Bond, Jr.


                                         /s/ Frank A. Bonsal, Jr.
                                         ------------------------------------
                                         Frank A. Bonsal, Jr.


                                         /s/ James A. Cole
                                         ------------------------------------
                                         James A. Cole



                               Page 17 of 19 pages
<PAGE>

                                         /s/ Nancy L. Dorman
                                         ------------------------------------
                                         Nancy L. Dorman


                                         /s/ Neal M. Douglas
                                         ------------------------------------
                                         Neal M. Douglas


                                         /s/ John W. Glynn, Jr.
                                         ------------------------------------
                                         John W. Glynn, Jr.


                                         /s/ Curran W. Harvey
                                         ------------------------------------
                                         Curran W. Harvey


                                         /s/ Ronald Kase
                                         ------------------------------------
                                         Ronald Kase


                                         /s/ C. Richard Kramlich
                                         ------------------------------------
                                         C. Richard Kramlich


                                         /s/ Robert F. Kuhling
                                         ------------------------------------
                                         Robert F. Kuhling


                                         /s/ Arthur J. Marks
                                         ------------------------------------
                                         Arthur J. Marks


                                         /s/ Thomas C. McConnell
                                         ------------------------------------
                                         Thomas C. McConnell


                                         /s/ Donald L. Murfin
                                         ------------------------------------
                                         Donald L. Murfin


                                         /s/ H. Leland Murphy
                                         ------------------------------------
                                         H. Leland Murphy


                               Page 18 of 19 pages
<PAGE>


                                         /s/ John M. Nehra
                                         ------------------------------------
                                         John M. Nehra


                                         /s/ Charles W. Newhall III
                                         ------------------------------------
                                         Charles W. Newhall III


                                         /s/ Terry L. Opdendyk
                                         ------------------------------------
                                         Terry L. Opdendyk


                                         /s/ Barbara J. Perrier
                                         ------------------------------------
                                         Barbara J. Perrier


                                         /s/ C. Vincent Prothro
                                         ------------------------------------
                                         C. Vincent Prothro


                                         /s/ C. Woodrow Rea, Jr.
                                         ------------------------------------
                                         C. Woodrow Rea, Jr.


                                         /s/ Howard D. Wolfe, Jr.
                                         ------------------------------------
                                         Howard D. Wolfe, Jr.


                                         /s/ Nora M. Zietz
                                         ------------------------------------
                                         Nora M. Zietz


                               Page 19 of 19 pages



</TEXT>
</DOCUMENT>
</SUBMISSION>
