18. CNEMIDOPHORUS 547 



Cnemidophorus vandenburghi DICKERSON, Bull. Amer. Mus. Nat. Hist., 

 Vol. 41, 1919, p. 477 (type locality, Carmen Island, Gulf of 

 California, Mexico); NELSON, Mem. Nat. Acad. Sci., Vol. XVI, 

 1921, pp. 114, 115, 171. 



Description. Snout long, with nearly vertical sides. 

 Nostrils opening in large anterior nasal plates, latter in con- 

 tact on top of snout. Posterior nasal forming sutures with 

 anterior nasal, first, second and sometimes third labials, 

 loreal, prefrontal and frontonasal plates. Loreal very large, 

 longer than high, in contact with third and fourth, or second, 

 third and fourth labials 5 first subocular, preocular, first 

 superciliary, prefrontal, posterior nasal, and first supraocu- 

 lar plates. Four supraoculars, first and fourth smaller than 

 others. Second, third and fourth supraoculars separated 

 from superciliaries by small, convex granules. Similar 

 granules intrude between third and fourth supraoculars and 

 frontoparietal and parietal. Occipitals represented by a few 

 series of small plates behind parietals and interparietal. 

 About five or six superior and six inferior labials to a point 

 below middle of eye. Sublabials large, separated from in- 

 fralabials by small granules and plates. Anterior gulars 

 largest centrally, becoming gradually smaller laterally and 

 anteriorly, not very sharply distinct from the smaller poster- 

 ior gulars. Scales on collar of medium size, largest centrally, 

 usually smaller at edge. Back covered with small, smooth, 

 convex granules. Usually three or four large preanals. 

 Posterior surface of forearm covered with small, nearly 

 equal-sized granules. Tail very long and covered with rings 

 of large, obliquely keeled scales. Femoral pores about 16 

 to 23. 



The color above is brownish olive, paler on the sides, 

 overlaid with tawny olive posteriorly, and crossed by narrow 

 transverse black bands. The posterior six of these bands 

 may extend entirely across the back, but the others are inter- 



