1^^ CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



CERROS ISLAND. 



Mr. Slevin spent one day on Cerros Island. Owing prob- 

 ably to the shortness of his visit, he failed to find a number of 

 species which have been recorded by others. On the other 

 hand, he secured a lizard and a snake not previously taken on 

 Cerros, so that 10 species are now known to live there. 



1. Hyla regilla Baird & Girard. 



Mr. Slevin did not secure this tree-toad, which has been 

 reported by Dr. Streets and Mr. Belding. 



2. Crotaphytus Vv^islizenii Baird & Girard. 



The Leopard Lizard is represented in our Cerros collection 

 by two specimens (Nos. 8843 and 8844) taken by Mr. Slevin, 

 July 18, 1905, in a dry wash in the south end of the island. 

 No. 8843 has femoral pores 24-25, and No. 8844 has 23-22 

 pores. 



3. Uta stansburiana Baird & Girard. 



Mr. Slevin secured eleven Utas which seem typical of this 

 species. These are Nos. 8845 to 8850, 8858 to 8859, and 8861 

 to 8863. Femoral pores in six of these vary from 11 to 15; 

 being 11 once, 12 once, 13 three times, 14 four times, and 15 

 three times. This lizard had been taken on Cerros by both Dr. 

 Streets and Mr. Belding. 



4. Sceloporus zosteromus Cope. 



Three specimens (Nos. 8842, 8856 and 8857) taken by Mr. 

 Slevin, July 18, 1905, confirm Mr. Belding's record of this 

 lizard. Femoral pores are 16-16, 17-18, 16-16. 



5. Phynosoma cerroense Stejneger. 



This horned toad was not found by Mr. Slevin. It is known 

 from a single specimen taken by Mr. Belding. 



6. Verticaria hyperythra beldingi (Stejneger). 



This lizard also was not secured here by Mr. Slevin. 



7. Cnemidophorus multiscutatus Cope. 



Cerros is the type locality of this form. Nine whiptails 

 (Nos. 8838 to 8841 and 8851 to 8855) were taken by Mr. 

 Slevin. Femoral pores in eight of these vary from 18 to 22; 

 being 18 twice, 19 three times, 20 five times, 21 five times, 

 and 22 once. 



