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



between interparietal plate and a line connecting posterior surfaces of thighs 

 varying from 43-48; males with enlarged postanal plates. 



The color above is grayish, brownish, or greenish blue, with a series of 

 dark brown blotches on each side of the back. A pale longitudinal band 

 separates the dorsal from the lateral regions. The sides are brownish or 

 grayish, mottled with darker brown and dotted or suffused with green or 

 pale blue. The head is usually crossed by narrow brown lines, more or less 

 irregular in distribution. A brown line connects the orbit and upper corner 

 of the ear, and is continued backward on the neck. There is a large blue 

 patch on each side of the belly, bordered internally with black in highly 

 colored males. The chin and throat are blue, pale anteriorly and changing 

 to black posteriorly, crossed by narrow oblique black lines which converge 

 posteriorly and blend with the black patches on the throat and in front of the 

 shoulders in males. There is a white patch at each side of the anus, and a 

 yellowish white band along the series of femoral pores. 



Length to anus 64 66 70 70' 



Length of tail 76 68 78 79 



Snout to ear 14 13 14 16 



Width of head 14 12 14 15 



Shielded part of head 14 13 14 15 



Fore limb 27 26 27 30 



Hind limb 41 39 41 46 



Base of fifth to end of fourth toe 16 15 16 18 



This species is in general appearance similar to S. occi- 

 dentalism but differs in the contact of the frontoparietal and 

 supraocular shields, the coloration of the throat, and the 

 somewhat more feeble carination and mucronation of its 

 dorsal and caudal scales. Specimens from Santa Rosa and 

 Santa Cruz islands, as stated below, seem to show that this 

 form has been developed from ^^ biseriatiis stock. 



Five specimens (Nos. 4534-4538) in the collection of the 

 California Academy of Sciences were secured by Mr. R. H. 

 Beck on San Miguel Island, March 26, 1903. 



3. Gerrhonotus scincicauda Skilion. 



One specimen (Cal. Acad. Sci. No. 4539) was taken by 

 Mr. Beck on San Miguel Island, March 26, 1903. It has 

 dorsals in 14^^ x 49 rows, temporals smooth, scales on arm 

 and forearm smooth, and dark ventral lines along the middles 

 of the scale rows. It seems to differ from the Santa Rosa 

 Island specimens only in the slightly more feeble carination 

 of the scales generally, the small size of the azygous 



1 Type. 



