0000950129-01-502213 S-8 4 20010731 20010731 LEXICON GENETICS INC/TX 0001062822 2835 760474169 1231 S-8 33 333-66380 1694189 4000 RESEARCH FOREST DRIVE 281-364-0100 THE WOODLANDS TX 77381 2813640100 4000 RESEARCH FOREST DR THE WOODLANDS TX 77381 S-8 1 h89380s-8.txt LEXICON GENETICS INCORPORATED EX-5.1 3 h89380ex5-1.txt OPINION OF VINSON & ELKINS L.L.P. EX-23.2 4 h89380ex23-2.txt CONSENT OF ARTHUR ANDERSEN LLP EX-99.1 5 h89380ex99-1.txt COELACANTH CORPORATION 1999 STOCK OPTION PLAN