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Y. — THE AUSTROKIPAEIAN EEGION. 



Y*. Reptiles whose distribution corresponds with the area of the 

 Austroriparian region — 24 : 



Trachystomata. 



Siren lacertina. 



Amira. 



Engystoma carolinense. 

 Acris gryllus grylhis. 

 Hyla squirella. 

 Hyla caroliuensis. 



Ophidia. 



Caudisona miliaria. 

 Ancistrodon j)iscivorus. 

 Elaps fulvius. 

 Haldea striatula. 

 Farancia abacura. 

 Cemophora coccinea. 

 Ophibolus doliatus coccineas. 

 Coluber obsoletus confinis. 

 Coluber guttatus. 

 Tropidonotus fasciatus. 



Lacertilia, 



Oligosoma laterale. 



Cnemidophorus sexlineatus sexlineatus. 



Opheosaurus ventralis. 



Anolis principalis. 



Testiidinata. 



Macrochelys lacertina (except Atlantic slope). 

 Pseudemys mobiliensis (except Atlantic slope). 

 Pseudemys concinna. 

 Testudo Carolina. 



Crocodilia. 



Alligator mississippiensis. 



As aleady remarked, this fauna is composed of the Floridan, Louis- 

 ianian, and Texan districts. 



