OPHIDIA. 367 



Dromicordryas Blgr., Mad. ; Elapoides Boie, Malay Arch. ; Glypholycus 

 Gthr., C. Afr. ; Gonionotophis Blgr., Congo ; Haldea B. and G., N. 

 Am. ; Haplocercus Gthr., Ceylon ; Helicops, Wagl., C. and S. Amer., 

 S.-E. As., trop. Afr. ; Hormonotus Hallow, W. Afr. ; Hydraethiops 

 Gthr., trop. Afr. Hydrablabes Blgr., Borneo ; Ischognathus D. ana 

 B., X. and C. Am. ; Lamprophis Smith, S. Afr. ; Lioheterodon D. 

 and B., Mad.; Liophidium Blgr., Madagascar; Lycognathophis Blgr. , 

 Seychelles ; Lycophidium D. and B., trop. and S. Afr. ; Macropisthodon 

 Blgr., E. Indies ; Micropisthodon Mocq., Mad. ; Opisthotropis. Gthr., 

 W. Afr., s. China, Malay Arch. ; Oxyrhabdium Blgr., Philippines ; 

 Plagiopholis Blgr., mountains of Burma ; Polyodontophis Blgr., 

 Mad., Comoros, S.-E. As., C. Am. ; Prymnomiodon Cope, Siam ; 

 Pseudoxenodon Blgr., E. Indies, S. China ; Pseudoxyrhopus Gthr., 

 Mad. ; Rhabdops Blgr., India, S. China ; Simocephalus Gthr., trop. 

 and S. Afr. ; Sirepiophorus D. and B., C. Am., N.-W. S. Am. 

 Tetralepis Boet., Java ; Trachischium Gthr., E. Himalayas, Khasi 

 Hills; Tretanorhinus D. and B., C. Am., Cuba; Trirhinopholis Blgr., 

 Burma ; Tropidonotus Kuhl, Eur., As., Af., N. Aust., N. and C. 

 Am., 74 species ; T. natrix, grass-snake, of this country, is widely 

 distributed, but absent from Scotland and Ireland, can climb trees 

 and swim, oviparous ; pair in May, June ; lay in July, August in 

 rich vegetable soil ; to 6 ft., average 3 ft. ; Xenochrophis Gthr., S.E. 

 As. ; Xylophis Beddome, S. India. 



II. Genera in which the hypapophyses are absent on the posterior 

 dorsal vertebrae, arranged alphabetically. 



Abastor Gr., N. Am. ; Ablabes D. and B., S.-E. Asia, Japan ; 

 Aporophis Cope, S. Amer. ; Arrhyton Gthr., Cuba ; Atractus Wagl., 

 C. and S. Am., about 25 species ; Calamaria Boie, from Assam, 

 Burmah and S. China to Malay Arch., about 35 species ; Carphophis 

 Gerv., N. Am. ; Cemophora Cope, N. Am. ; Chilomeniscus Cope, 

 Lower California; Chlorophis Hallow, trop. and S. Afr. ; Coluber L., 

 Eur., As., N. and trop. Amer., about 50 species. C. qiiatuorlineatits 

 Lacep. to 6 ft., Italy, S.E. Eur., S. Tyrol ; C. leopardinus Bp., S. 

 Italy, S.E. Eur., As. Min. ; C. longissimus Laur., aesculap Snake, S. 

 France, Italy. S.E. Eur. ; Contia B. and G., S.-W. Asia and Sind, 

 Am., about 20 species ; Coronella Laur., Eur., S.-W. As., India, N. 

 Amer., about 20 species ; C. laevis Lac. (austriaca], the smooth 

 snake, found in England, superficially resembles the viper but with 

 round pupils, to 2 ft. ; Cyclagras Cope, S. Am. ; Dendrelaphis Blgr., 

 India, Ceylon, Burma, Malay Pen. and Arch. ; Dendrophis Wagl., 

 S.-E. As., Aust., tree-snakes ; DimadesGr., S. Am. ; Dinodon D. and 

 B., China, Japan ; Dirosema Blgr., C. Am. ; Drepanodon Per., S. 

 Am. ; Dromicus Bibr., W. Indies, Chili, Peru ; Drymobius Cope, 

 Am., Texas to Peru ; Dryocalamus Gthr., S.-E. As. ; Farancia Gr., 

 X. Am. ; Ficimia Gr., Arizona, Texas, Mexico ; Gastropyxis Cope, 

 W. Afr. ; Geagras Cope, Mexico ; Geophis Wagl., C. and S. Am. ; 

 Gonyophis Blgr., Malay Pen., Borneo ; Grayia Gthr., trop. Afr. ; 

 Hapsidophrys Fisch., W. Afr. ; Herpetodryas Wagl. ; Heterodon Latr., 

 N. Am. ; Homalosoma Wagl., Afr. ; Hydromorphus Ptrs., C. Am. ; 

 Hydrops Wagl., S. Am. ; Hypsiglena Cope, S. N.-Am., C. Am., 

 Venezuela ; Hypsirhynchus Gthr., S. Domingo ; Idiopholis Mocq., 

 Borneo ; Leptocalamus Gthr., trop. Amer. ; Leptophis Bell, C. and S. 

 Am., tree snakes ; Liophis Wagl., Am., W. Indies, about 20 species ; 



