82 CALIFORNIA ACADEMY OF SCIENCES. 



Uta mearnsi (?), Cnemidophorus stejnegeri, 



Sceloporus orcutti, Verticariahyperytlirabeldingi( ?), 



Phrynosoma blainvillii, Lichanura roseofusca, 



Xantusia henshawi, Lichanura orcutti. 



Several forms of the neighboring areas have not been 



taken here, namely: 



Uta repeus, Sauromalus ater, 



Uta microscutata ( ?), Sceloporus magister, 



Cnemidophorus rubidus, Sceloporus occidentalis, 



Cnemidophorus tigris, Phrynosoma frontale, 



Xantusia vigilis, Crotalus cerastes. 



Northern species which have not been collected south 



of this area are : 



Sceloporus biseriatus, Eumeces skiltonianus (?), 



Sceloporus graciosus, Lanipropeltis boylii, 



Gerrhonotus scincicauda, Bascanion laterale, 



Anniella pulchra, Crotalus lucifer. 



A few southern forms are also limited by it, as : 

 Sceloporus zosteromus, Crotalus atrox. 



The reptiles of the islands which naturally belong to 

 Lower California may be divided into two groups, as fol- 

 lows : 



(a) Species which are purely insular; as, Sauroma- 

 lus hispidus, Uta -pahneri, Phrynosoma cerroense, Cnemi- 

 dophorus tnartyris, C . labtalis, and Verticaria sericea. 



(b) Species which occur also on the northern part of 

 the peninsula; as, Uta microscutata, Uta stansburiana, 

 Uta nigricauda, S celoporus zosteromus, Verticaria hype- 

 rythra beldingi, Crotalus atrox, Crotalus ■mitchellii, and 

 Callisaurus v entrails . 



No species characteristic of the San Lucas Fauna has 

 been collected on any of the islands.* 



It has been thought best to redescribe many of the spe- 

 cies which have been known only from the very brief and 

 often inadequate original characterizations. The descrip- 



" With the possible exception of Croiaphytus copeii. 



