go ‘Trans. Acad. Sci. of St. Louis. 
INDEX TO GENERA. 
Acris 14, 19 
Agave 29-35 
Ambystoma 13-15, 17-18 
Amphiuma 14-15, 18 
Amyda 15,21 
Ancistrodon 27 
Anolis, 14-15, 22 
Archinacella 50 
Bathyurus 51 
Bellerophon 51 
Bromelia 30 
Bucania 51 
Bufo 11, 19 
Bumastus 51 
Caluromys lv 
Carinaropsis 39, 50 
Carphophis 14-15, 26 
Cataschisma, 43, 50 
Ceraurus 51 
Chelydra 20 
Cheyletus 54 
Chorophilus 15, 19 
Chrysemys 14-15, 20-21 
Cinosternum 20 
Clemmys 12 
Cnemidophorus 14-16, 22-23 
Coluber 14-15, 24-25 
Conradella 50 
Crotalus 11, 27 
Crotaphytus 22 
Cryptobranchus 14 
Ctenodonta 39-40, 50 
Cyclonema 44 
Cyclophis 25 
Cyrtoceras 51 
Cyrtodonta 50 
Cyrtolites 50 
Dalmanella 39, 50 
Desmognathus 14-17 
Diadophis, 15, 25 
Diemyctylus 16 
Dinychus 54, 72-73 
Elaps 26 
Engystoma 19 
Eotomaria 51 
Farancia 26 
Gamasus 54, 67-68 
Goniophora 50 
Graptemys 15, 21 
Haldea 24 
Helcionopsis 51 
Helicotoma 44, 51 
Hemidactylium 15, 17 
Heterodon 11, 26 
Hindia 39, 50 
Holopea 51 
Hormotoma 45, 51 
Hyla 14-15, 19 
Hyletastes 54, 66 
Hyolithes 46 
Isotelus 51 
Laelaps, 54, 64-66 
Lampropeltis 14, 26 
Lichenaria 39, 50 
Lingula 50 
Liopeltis 25 
Liospira 40, 44, 51 
Lophospira 39, 51 
Lygosoma, 23 
Macrocheles 54, 63-64 
Macroclemmys 20 
Modiolodon, 41, 50 
Modiolopsis 42, 50 
Necturus 15, 18 
