200 3. IGUANIDJE 



ciliaries long, very slightly projecting laterally, and strong- 

 ly imbricate. Middle subocular very long, narrow, and 

 strongly keeled. Rostral very wide and rather low. Four 

 to six long low supralabials. Symphyseal plate moderately 

 large, followed by series of large plates in contact with first 

 pair of lower labials but separated from the others by one 

 or two rows of sublabials. Chin and gular region covered 

 with smooth subhexagonal granules, largest centrally and 

 becoming imbricate on the strong transverse fold. Edge 

 of fold with a series of projecting scales. Ear-opening 

 large, with an anterior denticulation of from two to four 

 pointed scales of much variation in size and shape. About 

 two rows of medium-sized or small scales along middle of 

 back, bordered on each side by about two rows of much 

 larger strongly keeled scales of which those of the outer 

 row normally are much smaller and often are absent anteri- 

 orly. Other dorsal scales very small except a row of 

 widely-separated enlarged scales on upper or dorsolateral 

 longitudinal dermal fold. A few enlarged scales on lower 

 or lateral fold. A number of more or less well-developed 

 oblique groups of enlarged granules or tubercles between 

 these folds. A group of large tubercles on dorsolateral 

 fold of neck. Tail bearing whorls of strongly keeled and 

 sharply pointed scales, which are much broader above than 

 below j about every third whorl larger. Posterior surfaces 

 of thighs and arms covered with small granules similar to 

 those on sides of body. Superior and anterior surfaces of 

 limbs provided with large, keeled scales. Ventral scales 

 smooth and about size of those on gular fold. Femoral 

 pores varying from eight to thirteen in number on each 

 thigh. Ten to 13 of largest dorsal scales equalling length 

 of shielded part of head. Tail less than twice as long as 

 head and body. Males with enlarged postanal plates. 

 The general color above is grayish, blackish or brown- 



