1922] Schmidt, Amphibians and Reptiles of Lower California 675 



Cnemidophorus vandenburghi Dickerson 



Cnemidophorus vandenburghi Dickerson, 1919, p. 477. ' 

 Range. — Carmen Island, Gulf of California. 



The single specimen (U. S. N. M. No. 64449), collected by the 

 Albatross Expedition, on which this species is based appears to be suffi- 

 ciently distinct from any peninsular Cnemidophorus or from C. celeripes 

 on San Jose Island. Although much smaller in size than the specimens 

 of celeripes, the color pattern represents the end stage of the usual 

 tessellatus development, being distinguished further by an unusually 

 fine division of the residual black spotting. 



Cnemidophorus celeripes Dickerson 

 Plate LVII 

 Cnemidophorus celeripes Dickerson, 1919, p. 472. 2 

 Range. — San Jose" Island, Gulf of California. 



Two specimens of a Cnemidophorus were collected on San Jose* 

 Island by the Albatross Expedition. Aside from the species related to 

 C. martyris Stejneger, they certainly represent the most distinct of the 

 insular species of this genus in the Gulf of California, being readily dis- 

 tinguishable from the remaining Lower Californian species of the 

 tessellatus group by their retention of sharply defined black lines in the 

 adult phase of coloration. 



Dickerson (loc. cit.) has tentatively referred the Cnemidophorus 

 grahami recorded from Santa Rosalia and Mulege by Mocquard (1899, 

 p. 315) to this form. In the examination of the Gulf insular faunas which 

 I have been able to make, it appears that the San Jose species are in 

 general more distinct from the peninsular forms than are those on Carmen 

 Island, the latter being frequently identical with those on the mainland. 

 It is, therefore, more probable that Mocquard's C. grahami, and probably 

 his C. sexlineatus from Santa Rosalia as well, are C. vandenburghi. This 

 question must await the evidence of further collections, which are 

 urgently needed from the whole of the Gulf side of the peninsula north of 

 La Paz. It is not improbable that C. maximus will be discovered in this 

 area when it is more fully explored. 



Cnemidophorus estebanensis Dickerson 

 Cnemidophorus estebanensis Dickerson, 1919, p. 474. 3 



Range. — Confined to San Esteban Island, Gulf of California. 



The single Cnemidophorus collected by the Albatross Expedition on 

 San Esteban Island is the type of this species. It is certainly well dis- 



'Type: U. S. N. M. No. 64449. 

 2 Type: U. S. N. M. No. 64444. 

 'Type: U. S. N. M. No. 64446. 



