106 3. IGUANID.^ 



p. 259; Camp, Univ. Cal. Pubis. Zool., Vol. 12, No. 17, 1916, 

 p. 521; Camp, Univ. Cal. Pubis. Zool., Vol. 17, No. 7, 1916, 

 p. 70; Grinnell & Camp, Univ. Cal. Pubis. Zool., Vol. 17, No. 10, 

 1917, p. 153; Stejneger & Barbour, Check List N. Amer. Amph. 

 Rept., 1917, p. 45; Cowles, Journ. Entomolo. & Zool., Pomona 

 College, Vol. XII, No. 3, 1920, p. 64; Stephens, Trans. San 

 Diego Soc. Nat. Hist., Vol. Ill, No. 4, 1921, p. 61; Van Den- 

 burgh & Slevin, Proc. Cal. Acad. Sci., Ser. 4, Vol. XI, 1921, 

 pp. 28, 31, 40, 51 ; Nelson, Mem. Nat. Acad. Sci., Vol. XVI, 1921, 

 pp. 114, 126. 



Description. — Head large, depressed, and very distinct 

 from the neck on account of swollen temples. Its plates 

 all small but largest and somewhat convex on snout. Two 

 longitudinal rows of shields separating supraocular regions. 

 Nostrils large and opening laterally, each in a round plate 

 nearer to end of snout than to orbit. Superciliaries small 

 but imbricate. Supralabials rather prominent and of nearly 

 equal size. A large subocular plate. Ear-opening large, 

 oblique, with very slight anterior denticulation. Supra- 

 oculars, temporals and gulars subgranular. Lower labials 

 a little larger than upper, bordered below by several series 

 of plates larger than gulars. Symphyseal plate large, fol- 

 lowed by a pair of large shields. One or two gular folds, 

 continued on sides of neck. Back and sides covered with 

 small granules which pass gradually into larger smooth flat 

 scales on belly. Sides irregularly plicate. Tail tapering, 

 nearly twice as long as head and body, and furnished with 

 whorls of small, smooth plates. Femoral pores varying in 

 number from 14 to 22 in each series. Males wirh enlarged 

 postanal plates. 



The general color is greenish, bluish, olive, grayish, or 

 pale brown, variously dotted, blotched, reticulated and 

 cross-lined with pale gray or white. Two parallel oblique 

 bands of intense black or very dark brown cross the 

 shoulders, but often do not meet on the nape. The tail 



