ON THE REPTILIA OF PERTJ. 



169 



is short, wide, and convex above, with very large orbits. Its length to ear is less 



than that of the tibia, and the length of the muzzle less than the width at the 



front of the orbits. Occipital scute subround, larger than tympanum, surrounded 



by numerous smaller smooth scales. Superciliaries separated by two rows of small 



scuta. Rugae distinct, low, inclosing a concavity containing smaller scales than 



the rugal, in four longitudinal rows. Ten rows crossed by a section of the muzzle 



at the middle. Supraorbitals seventeen or eighteen, smooth or nearly so. Loreals 



six rows ; infralabials scarcely distinct, keeled. Meatus round, equal half diameter 



of eye-slit. Fan small. The hind limb reaches beyond the front of the orbit, 



and the fore limb to beyond the end of the muzzle. 



M. 



. .1300 



Total length 

 Length to vent . 



" to axilla . 



" to ear 



" to orbit . 

 Width of head at jaws 

 Length of hind limb . 



" of hind foot 



.0460 

 .0230 

 .0118 

 .0040 

 .0065 

 .0400 

 .0170 



General color bright olive, shaded with brown above. A dark band from ear 

 to shoulder, and vertical blackish bars on the sides. Fan dark ] indigo. A longi- 

 tudinal black band on the former behind. A white spot on each side of the lower 

 jaw in three specimens. 



Four specimens from Nauta. 



This species is near the A. trachydermus and A. lemumius, Cope. From the 

 former, the very different form of head, the distinct rugal scales of the front, 

 inclosing larger and smoother scales, with the small smooth dorsal scales distinguish 

 it. The A. lemurinus resembles it in form, but has larger dorsal scales. 



20. NoKOPS DUODECiMSTRiATUS, Bei'thold ; N. macrodactyhcs, Hallow. 

 Two specimens from Santarem, Brazil. 



21. Iguana tuberculata, Laur. 



22. Enyalius laticeps, Gulcheuot in Castlenau's Anim. Nouv. ou rare Amer. Sud, pi. 



23. Enyalius coerulescens, Cope, sp. iiov. 



A dentellated nuchal crest, a vertebral band of linear scales ; no caudal crest ; 

 all subround in section. Head wide, the muzzle parabolic, its entire surface includ- 

 ing the supraorbital region covered with equal, acutely tubercular scales. Three 



43 



