542 8. TEllDJE 



North San Lorenzo and Sal Si Puedes islands, the lower 

 surfaces in adults being generally suffused with black or 

 blackish brown. In other respects they seem identical with 

 specimens from the two northern islands, so that I have 

 been reluctant to describe them as a distinct species. Their 

 dark coloring may be due to darker rocks or soil on the 

 island, but on San Pedro Martir Island dark lizards occur 

 on white rocks. 



Habits. — On Sal Si Puedes Island this was a fairly com- 

 mon but extremely shy lizard. Most of the specimens were 

 taken under the low-growing shrubs in the bottoms of the 

 small arroyos. Their protective coloration was excellent, 

 blending perfectly with the slate blue rocks which cover the 

 island. 



1 1 7. Cnemidophorus catalinensis VanDenburgh & Slevin 

 Catalina Island Whiptail 



Cnemidophorus disparilis Dickerson, Bull. Amer. Mus. Nat. Hist., 



Vol. 41, 1919, p. 473 (part). 

 Cnemidophorus catalinensis Van Denburgh & Slevin, Proc. Cal. Acad. 

 .^_ Sci., Ser. 4, Vol. XI, No. 17, 1921, p. 396 (type locality, Santa 



Catalina Island, Gulf of California, Mexico). 



Description. — Body long, with a very slender tail and 

 very long legs. Nostrils opening in large anterior nasal 

 plates, latter in contact on top of snout. Posterior nasal 

 forming sutures with anterior nasal, first, second, and third 

 labials, loreal, prefrontal, and frontonasal plates. Loreal 

 in contact with third and fourth (rarely fifth) labial, first 

 subocular, preocular, first superciliary, prefrontal, posterior 

 nasal, and usually first supraocular plates. Three or usually 

 four supraoculars, fourth smallest. Second, third, and 

 fourth supraoculars separated from superciliaries by small 

 convex granules. Similar granules between third and fourth 



