170 



ON THE REPTILIA OF PERU. 



rows intervene between the superciliary rows ; occipital scarcely distinct. Nostril 

 pierced in a small round shield ; nearer orbit than end of muzzle. Loreal region 

 very short, with ten scales on a vertical line. Supraocular scales eighteen, counting 

 to nostril. Labials 11-11, a short series of distinct, smooth infralabials. Auricu- 

 lar opening large. Dorsal scales very small, keeled, in transverse rows ; abdominal 

 scales larger, in cross series, interrupted on the middle line, keeled. The hind 

 leg and wrist extend to front of orbit. 



Color black, with numerous indistinct blue cross bands. Limbs, especially the 

 forearm, and the sides of the neck, dark blue. Lower surfaces white, except throat 



and chin, which are blackish-blue. 



M. 

 .185 



.072 



.034 



.018 

 .006 



hrasiliensis. 



Total length 

 Length to vent . 



" to axilla . 



" to ear 



" to orbit . 



Width at anterior angle of orbit .009 ; apparently allied to the E. 

 Lesson (Voyage Coquille Reptiles, PI. I., fig. 3), but that species has a dorsal crest 

 of erect scales. 



24. Hyperanodon ochrocollaris, Spix, Dum. Bibr. Erpet. Gen., Y. 



25. Hyperanodon pextigerus, Cope, sp. nov. 



Scales of belly, sides, and back of about equal size, the former keeled, those of 

 sides and back without median keel, but with a strong mucro (the epidermis is 

 lost). A crest of processes on the nape which extend on the back to its middle 

 only as a row of keeled scales. Top of head covered with large scales ; the occi- 

 pital broader than long, bounded behind by small scales and at the middle on each 

 side by a small oval parietal. Three scales on the front between the can thus 

 rostrales, the outer ones the front of the superciliary series, which are partially 

 united between the orbits. Six scales across the front behind the nostrils. Supra- 

 orbitals in a single row of four transverse scales, which are bounded by a series 

 of small ones on the inner border, and from one to two rows on the outer margin. 

 Rostral narrow, horizontal ; four upper, five lower labials. Symphyseal deeper than 

 wide, truncate behind ; one anterior infralabial larger than the rest, smooth. Scales 

 of the limbs smooth, except a few with obsolete keels on the upper side of the 

 humerus and of the femur. Cervical dermal fold strong, extending to a point 

 above the humerus. Tympanum large ; nostril in a single plate, which is sepa- 

 rated from the rostral and superior labial by a single row of scales. When the 



