14 CALIFORNIA ACADEMY OF SCIENCES. 



Distribution of Californian Eeptiles — Conclnded. 



The Desert Fauna. — The CDlorado 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, 

 Coleouyx variegatus, 

 Dipsosaurus dorsalis, 

 Uma notata, 

 Uma inoruata, 

 Callisaurus veutralis, 

 Crotaphytns baileyi, 

 Crotaphytus wislizeuii, 

 Sai;romalns ater, 

 Uta graciosa, 

 Uta symmetrica, 

 Sceloponis magister, 



Phrynosoma platyrhinos, 

 Phrynosoma m'callii, 

 Xautusia vigilis, 

 Cnemidophorus tigris, 

 Siagouodoii humilis, 

 Chilomeuiscus ephippicus, 

 Chionactis occipitalis, 

 Bascauion treuiatum ( ?), 

 Pituophis cateuifer deserticola, 

 Crotalns tigris, 

 Orotalus cerastes, 

 Crotalus mitchellii. 



