402 3. IGUANIDM 



rather large. Several longitudinal series of gular scales 

 enii:rged and spinose, becoming smaller toward median line, 

 the external row continued to the gular fold. A series of 

 five sublabials, the last largest and separated from the broad 

 subrictal spine, which is followed by a long, slender one. 

 Two groups of spines on each side of neck, the inferior of 

 two spinif orm, the superior of five or six simply conic. Back 

 and tail with large, scattered, somewhat elevated, keeled 

 scales between which are smaller scales and granules. Five 

 to eight rows of flat, keeled, scales along middorsal region, 

 some of those of external row being much larger. One or 

 two rows of peripheral spinose scales, the lower peripheral 

 spine row sometimes being obsolete and only indicated by a 

 few scattered, small spines. Tail with two series of lateral, 

 marginal, conic scales, superior row sparse. A group of 

 spines behind thigh. Scales on anterior limbs large and 

 keeled above, smooth below except on palm and digits. 

 Hind limb above with small flat scales mixed with large 

 acuminate ones; below, with smooth scales, except on foot. 

 Scales of upper surface of tail heterogeneous. Digital 

 scales not laterally elongate. Ventrals smooth, about as 

 large as median dorsals. Fifteen to 1 8 femoral pores on 

 each thigh; series well separated medially. 



The color above is brownish ash, paler on the limbs and 

 tail. A dark blotch occupies each side of the neck. There 

 are three irregular dark cross-bands on the back, the third 

 at the groin. Each cross-band displays a deep notch poste- 

 riorly, and the external portion is continued posteriorly to 

 join the band next behind, the flanks being entirely brown. 

 No distinct cross-bands on limbs and tail. Snout and muzzle 

 brown. Occipital horns mahogany. Lower surfaces cream- 

 color, with a few indistinct dusky spots on the belly. 



