2 CALIFORNIA ACADEMY OF SCIENCES [Proc. 3D Ser. 



Page 



San Martin Island 18 



San Benito Island 21 



Cerros Island 22 



Natividad Island 24 



Magdalena Island 24 



Santa Margarita Island 25 



Socorro Island 26 



Clarion Island 27 



Introductory Remarks. 



The first contribution to the herpetology of the islands of 

 the Pacific Coast of North America of which I have knowl- 

 edge was, curiously enough, a description of the lizard of 

 Socorro, an island perhaps the least accessible of them all. 

 This description was published by Professor Cope in 1871. 

 Six years later Dr. Streets recorded a few notes on the fauna 

 of Cerros, San Martin, and Los Coronados. Since that time 

 there have appeared at intervals contributions from Yarrow, 

 Belding, Cope, Garman, Townsend, Stejneger, and Van 

 Denburgh, resulting in the gradual accumulation of a con- 

 siderable fund of knowledge. The papers in which this 

 information is contained are so widely scattered through 

 journals and the publications of various societies and museums 

 as to be but little available. It has, therefore, been thought 

 expedient to review the whole subject while reporting upon 

 the material which in the last few years has been accumulat- 

 ing in the collection of the Academy. 



In this paper there are mentioned or described twenty-nine 

 species and subspecies, representing the fauna of eighteen 

 islands. Of these four are amphibians, nineteen are lizards, 

 and six are snakes. 



The following forms are here described as new: — 



Aictodaxr lugubris farallonensis. South Farallon Island, 



Uta martinensis, San Martin Island, 



Ula stellata, San Benito Island, 



Sceloporus becki, San Miguel Island, 



Gerrhonotus scincicauda ignavus, San Martin Island. 



The island distribution of the various species and sub 

 species is indicated in the following table : 



