160 



ON THE REPTILIA OF PERU. 



3. Propus vermiformis, Cope, Proceed. Acad. Philada. 1814, p. TO. 

 From Nauta. 



4. Lepidosoma carinicaudatum, Cope, sp. nov. 



Scales large, angulate, strongly keeled on trie back and sides ; four abdominal 

 rows with the keel reduced to -an angle and mucro, otherwise like the dorsal scales. 

 The dorsals are a little larger than the ventrals, and these a little larger than the 

 inferior lateral. A few small scales in the groin and axilla, and above the humerus. 

 No granular scales on the side of the neck, but keeled scales between the arm and 

 ear. Nuchal scales like the dorsal ; the gulars a little smaller than the ventrals, 

 keeled and mucronate. Four superior rows of caudal scales strongly keeled, 

 forming four continuous ridges. Two lateral rows weakly keeled ; four inferior 

 series strongly keeled, forming ridges. Twenty-six oblique rows of scales between 

 occiput and posterior line of femora ; twenty-seven between infralabials and femo- 

 ral pores, and twenty-one in a circle round the body. Two large preanal scuta, 

 each flanked by a small lateral, and preceded by an oval median scale, which has 

 a small one on each side. 



The frontonasal plate is broader than long ; the prefrontals not extensively in 

 contact, and the frontal is twice as long as wide. The frontoparietals are largely in 

 contact, and the parietals and interparietals are longitudinal and subequal in size. 

 Two loreals, one above the other, no preoculars ; five supraoculars and four supra- 

 orbitals. The temporal scales small, smooth ; larger and keeled behind. Cranial 

 plates behind the prefrontals with one or two linear ridges. Three pairs of very 

 large infralabials, a row of granules only separating ths last pair. Eleven femoral 

 pores on each side. The diameter of the oval meatus auditorius is equal to that 

 of the eye-slit. The limbs are covered with large keeled scales, except the postero- 

 inferior faces of the femur and humerus, which are granulated. The limbs are 

 short, the anterior reaching the middle of the orbit, the posterior five-sixths the 

 distance to the axilla. Thumb clawed. 



M. 

 Total length (tail partly renewed) ...... .115 



Length to vent .... 



" to axilla .... 



" to ear .... 



" to orbit . . . . 

 "Width of head at angle of jaws . 

 Length of hind limb . 



" of hind foot 



.050 



.021 



.011 



.003 



.0085 



.023 



.011 



