14 



CALIFORNIA ACADEMY OF SCIENCES. 



DISTRIBUTION OF CALIFORNIAN REPTILES Concluded. 



The Deseri Fauna. The Colorado and Mojave Deserts 

 with western and northern arms, one of which invades 

 the southern part of the San Joaquin Valley, constitute 

 the Californian portion of what may here be termed the 

 Desert Fauna. This Fauna, as we have seen, is inhab- 

 ited by thirty-one (or thirty-three) species and subspe- 

 cies of reptiles, of which the following twenty-three (or 

 twenty-four) occur in no other area of the State: 



Gopherus agassizii, 

 Coleonyx variegatus, 

 Dipsosaurus dorsalis, 

 Uma notata, 

 Uma inornata, 

 Callisaurus ventralis, 

 Crotaphytus baileyi, 

 Crotaphytus wislizenii, 

 Sauromalus ater, 

 Uta graciosa, 

 Uta symmetrica, 

 Sceloporus magister, 



Phrynosoma platyrhinos, 

 Phrynosoma m'callii, 

 Xantusia vigilis, 

 Cnemidophorus tigris, 

 Siagouodou humilis, 

 Chilomeniscus ephippicns, 

 Chionactis occipitalis, 

 Bascanion taeniatum (?), 

 Pituophis catenifer deserticola, 

 Crotalus tigris, 

 Crotalus cerastes, 

 Crotalus mitchellii. 



