CLASS REPTILIA. 



C. Tail ending in a spine ; subcaudal plates simple, one 

 rowed, head with shields behind the eyes. Tisiphone Fitz. 

 Cenchris. Daud. — Ancistodan, Pallas. 



Catesby's Tisiphone. Tisiphone Shausii, Gray. Coluber 

 Tisiphone, Shaw. Catesby Car. ij. t. 45. Peleas Niger 

 fusens, Merrem. Cenchris Mockeson, Daud, t. 60, and 

 t. 7^- ^' 3> '*• — See also Tisiphone Cupoea, Fitz. South 

 America. 



D. Tail ending in a spine ; snhcaudal plates double and 



single ; head with scales. Lachesis. 



L. Rhombeata. Pf. Max. Crotalus Mutus, Lin. Boa 

 Mutus, Lacep. Scytale Catenata, Licht. Lachesis Mutus, 

 Daud. Cophias Crotalinus, Merrem. Curuacea, Margr. 

 Bothrops Suruacea, Wagler. Braz. t. 23. 



E. Tail simple ; sub-caudal plates double ; head scaly. Co- 

 phias, Merrem. Crassedocephalus, Fitzenger. Bothrops, 

 Spio!^. Trigenocephalus, Oppel, Alecto, Megaera, Atropos, 

 and Tropidolaemus, Wagler. 



American. 



Cophias Lanceolatus. Coluber, Lacep. ij. t. 5.f. 1. Vipera, 



Daud. Col. Megaera, Shaw. Brazils. Cophias Maegera. 



Bothrops, Spix, t. 19. Cophias Furia, Boie. Bothrops, 



Spix, t. 20. Cophias Leucostigma. Bothrops, Spix, 



t. 21. f. 1. Cophias Tessalatus. Bothrops, Spix, t. 2J. 



f. 2. Cophias Taeniatus. Bothrops, Spix, t. 21. f. 3. 



Cophias Triangulum, Boie. Mus. Leyd. Vip. Brasiliana, 



Lacep. Cophias Jacaraca, Pr. Max. adult and jun. 



Col. Atrox, Pr. Max. not Merrem. Cophias Atrox, Mer- 

 rem. Col. Atrox, Linn. Mus. Adolph. j. t. 23. f. 9. Vip. 

 Atrox, Laur. Col. Ambiguum, Weigl. Vip. Weigelii, 

 Daud. Vip. Tigrina, Daud.— Vipera Tigrina, Licht. 

 Cophias Neuweidii. C. Bothrops, Spix, t. 21. f. 1. 



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