536 8. TEllDJE 



1 1 4. Cnemidophorus estebanensis Dickerson 

 San Esteban Island Whiptail 



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

 Vol. 41, 1919, p. 474 (type locality, San Esteban Island, Gulf 

 of California, Mexico); Nelson, Mem. Nat. Acad. Sci., Vol. 

 XVI, 1921, p. 171. 



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 

 usually third labials, loreal, prefrontal, and frontonasal 

 plates. Loreal in contact with third and fourth and rarely 

 second labials, first subocular, preocular, first superciliary, 

 prefrontal, posterior nasal, and usually first supraocular 

 plates. Four supraoculars, fourth smallest, and sometimes 

 divided. 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 occi- 

 pitals behind parietals and interparietal. About five or six 

 superior and five to seven 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 poster- 

 ior gulars. Scales on center of collar larger than those on 

 its edge. Back covered with small, smooth, convex granules. 

 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 

 small, nearly equal-sized granules. Tail long, provided 

 with rings of large, obliquely keeled scales. Femoral pores 

 varying from 1 8 to 2 1 on each thigh. 



