540 8. TEIID^ 



Habits. — These rather rare lizards were found along 

 the rocky slopes of the island. Their very dark coloring 

 caused them to show plainly against the snow white rocks 

 over which they were running. 



1 1 6. Cnemidophorus canus Van Denburgh & Slevin 

 Sal Si Puedes Island Whiptail 



Cnemidophorus canus Van Denburgh & Slevin, Proc. Cal. Acad. Sci., 

 Ser. 4, Vol. XI, No. 6, 1921, p. 97 (type locality, Sal Si Puedes 

 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 labials, first subocular, pre- 

 ocular, first superciliary, prefrontal, posterior nasal, and 

 usually first supraocular plates. Four supraoculars, fourth 

 smallest. Second, third, and fourth supraoculars separated 

 from superciliaries by small convex granules. Similar gran- 

 ules between third and fourth supraoculars and frontopar- 

 ietal and parietal. One to three transverse series of small 

 occipitals behind parietals and interparietal. About five 

 superior and five or six inferior labials to a point below 

 pupil. Sublabials large and, except anteriorly, separated 

 from infralabials by small granules and plates. Anterior 

 gulars largest centrally, becoming gradually smaller laterally 

 and anteriorly, and changing rather abruptly to smaller post- 

 erior gulars. Scales on center of collar larger than those 

 on its edge. Back covered with small, smooth, convex gran- 

 ules. Ventral plates in eight longitudinal rows. Three or 

 four large plates, surrounded by smaller plates and granules, 

 in front of anus. Posterior surface of forearm covered with 



