ON THE REPTILIA OF PERU. 165 



of flat scales much larger than those of the nape. The latter, with those of the 

 back and sides, subequal, flat, subhexagonal, and of small size. Scuta of front 

 and back of humerus continuous with each other, and nearly so with those of 

 cubitus, which form two rows, the posterior very wide. Femoral pores twelve. 

 The fore foot reaches the nostril ; the posterior, the middle of the tympanum. 



Color bright olive-green, with yellow muzzle, and a pale dorsal band. There 

 are three pale lines on the side, from the orbit, ear, and axilla respectively, of 

 which the middle one is interrupted and separated from the superior by an irregular 

 black band. Below white, sides blue. Length from end of muzzle to vent, m. 

 .048. 



From the valley of Jequetepeque, Peru. 



This species resembles the Amiva hedracantha, Boc, Miss. Scient. Mexique, p. 

 263, in its preanal spines and other respects. According to M. Bocourt that spe- 

 cies has but one frontoparietal shield, which is of unusually short proportions, thus 

 resembling the genus Verticaria, Cope. It also differs from the C. armatulus in 

 the presence of two preoculars (one in C. armatulus), and in having a single large 

 median preanal plate. 



13. Amiva surinamensis, Gray, Dura. Bibr. Erp. Gen., V. p. 100. 

 Rioja and Nauta, Peru ; Maranon, and Santarem. 



IGUANIA. 



14. Scytomycterus l^vis, Cope, gen. et sp. nov. Anolidaruni. 



Char. Gen. — General structure as in Anolis, the posterior teeth with three 

 cusps, the median larger. Rostral plate produced into a flexible appendage. 



This form approaches nearest to the Anolis gracilis, in which the end of the 

 muzzle is slightly protuberant, but is not prolonged into a process. This species 

 has been erected into a genus by Dr. Gray under the name of Rhinosaurus, with- 

 out, as it appears to me, sufficient reason. The name is also preoccupied. 



Char. Sjiecif. — Scales of the body smooth, of nearly equal size ; those of the 

 tail larger, the median superior series not different from the others. Scales of the 

 head large and smooth, only three rows between those of the canthus rostralis at 

 the middle. The latter are unusually wide, and the median row larger than those 

 on each side of it. The latter are continued posteriorly into the superciliary 

 rows, which are large, and in contact along the entire middle line. The middle 

 row of the muzzle is replaced by two rows in the shallow frontal concavity. 

 There are four rows between the nostrils. The occipital is large, in contact with 

 superciliary shields in front, and with flat scales behind. One row of loreal scales, 

 42 



