250 3. IGUANIDAL 



frontal divided transversely} three to five enlarged supra- 

 oculars, separated from the frontals and frontoparietals by 

 one or two series of granules. Superciliaries long, narrow 

 and projecting. Central subocular very long, narrow and 

 strongly keeled. Rostral and supralabials long and low; 

 usually five or six supralabials. Symphyseal moderately 

 small, followed by two or three pairs of larger plates sep- 

 arated (except first) from the infralabials by one or two 

 series of moderately enlarged subiabials. Gular region 

 covered with small, smooth, hexagonal or rounded scales 

 which change gradually to granules on sides of neck and to 

 larger imbricate scales on strong gular fold, largest on den- 

 ticulate edge of gular fold where somewhat larger than 

 ventrals. Several enlarged plates in front of ear-opening. 

 Ear denticulation short, of two to four scales, the largest ex- 

 ceeding in length diameter of largest plate in front of ear. 

 Back covered with scales of nearly uniform size becoming 

 rather abruptly granular on sides of body, scales of central 

 rows strongly keeled, imbricate, shortly mucronate, not sep- 

 arated by minute granules. Scales largest on tail, strongly 

 keeled and mucronate above and on sides, imbricate. Pos- 

 terior surfaces of thighs and arms covered with small gran- 

 ular scales similar to those on sides of body; other surfaces 

 of limbs provided with imbricate scales, strongly keeled on 

 upper surfaces. Femoral pores 11 to 17; average in 78 

 thighs, 14.1. Sixteen to 20 largest dorsals equal shielded 

 part of head. Number of dorsal scales in a row from inter- 

 parietal plate to a line joining backs of thighs varies from 

 70 to 81; average in 30 specimens, 74.6. Fifth finger not 

 reaching end of second; fifth toe not reaching end of second. 

 The head is brownish or grayish olive above, often with 

 light bluish spots. The side of the head is brownish with 

 two longitudinal light bluish or yellowish lines or series of 

 spots along the lip and neck, passing through the ear, and 



