23+ 3. IGUANID/E 



nearer to end of snout than to orbit. Plates on head large, 

 smooth and usually more or less convex; interparetial larg- 

 est. Frontal plate usually divided transversely. Three to 

 five supraoculars, enlarged, and separated from frontals by 

 one row of granules. Superciliaries long, somewhat project- 

 ing laterally, and strongly imbricate. Central subocular 

 very long, narrow, and strongly keeled. Rostral and supra- 

 labials very long and low. Other plates of upper surface 

 of head very irregular in size and position. Symphyseal 

 plate rather small, followed by three or four pairs of larger 

 smooth plates separated from small infralabials by from 

 one to three series of moderately enlarged sublabials. Gular 

 region covered with small, smooth, hexagonal scales, which 

 change gradually into granules on sides of neck, and into 

 larger scales on strong transverse gular fold where they are 

 about the size of those on belly. Edge of gular fold with a 

 series of larger projecting scales. Ear-opening with strong 

 denticulation of three or four pointed scales. Several longi- 

 tudinal dermal folds usually present on sides of body and 

 neck. Back covered with small, keeled, imbricate scales of 

 nearly uniform size, becoming gradually granular on neck 

 and sides. Number of dorsal scales in a line from inter- 

 parietal plate to a line joining posterior surfaces of thighs 

 varying from 87 to 117; average, 102.3. Scales on tail lar- 

 gest, strongly keeled, sharply pointed, and larger above than 

 below. Posterior surfaces of thighs and arms covered with 

 small granular scales similar to those on sides of body. Other 

 surfaces of limbs provided with large scales, keeled except 

 on ventral surfaces of thighs, legs, and arms. Femoral pores 

 varying in number from 12 to 17; average, 14. About 23 

 to 28 dorsal scales equaling the shielded part of head. 



This lizard seems not to differ from the other sub- 

 species either in the color pattern or intensity. The amount 

 of variation is equally great. The back and sides are van- 



