XX INDEX. 



II. SAURI A— (continued). 



Pygodactylus, 43 

 Bipes, 43 

 Chalcides, 43 

 Tetradactylus, 44 

 Saurophis, 44 

 Brachypus, 44 

 Chalcis, 44 

 Copheas, 44 

 Colobus, 44 

 Chirotes, 44 

 Icthyosaurus, 44 

 Plesiosaurus, 44 

 Hylceosaurus, 45 



III. OPHIDIA, 45 



Fam. I. Anguina, 45 

 Anguis, 46 

 Pseuopus, 46 

 Ophisaurus, 46 

 Anguis proper, 46 

 Acontias, 47 



Fam. II. Serpentia, 47 



1st Tribe. Amphisboena, 48 



Leposternon, 48 



Typhlops, 49 

 2nd Tribe. Serpents proper, 49 



Venomous, 49 



Non-venomous, 50 



Venomous Tortrix, 50 



Uropeltes, 50 



Anilius, 50 



Torquatrix, 50 



Ilysia, 50 



Non-venomous Boas, 51 



Coralle, 52 



Xiphosoma, 52 



Cenchris, 52 



Scytale, 52 



Erix, 52 



Erpeton, 52 

 Coluber, 53 



Python, 53 



Cerberus, 53 



Xenopeltis, 53 



Heteredon, 53 



Hurria, 54 



Dipsas, 54 



Bungarus, 54 (continued) 



