10. CROCODILTJRUS. — 11. NEXT8TICURT7S. 381 



pores very small, rather indistinct, six to ten. Caudal scales elon- 

 gate, keeled, straight, in regular cross rows, the upper with pointed 

 posterior edge, the laterals and inferior rounded posteriorly. Brown 

 above, dotted with black ; digits with black annuli ; lower surfaces 

 yellow, with scattered blackish spots. 



11. NEUSTICURUS. 



Neusticm'us, Dutn. ^- Bibr. v. p. Gl. 

 Custa {non Flem.), Gray, Cat. Liz. p. 25. 



Tongue moderately elongate, arrow-headed. Lateral teeth com- 

 pressed, bi- or tricuspid. Head with large regular shields ; fronto- 

 nasal separating the nasals ; prcefrontals and frontoparietals present ; 

 nostril pierced in the middle of a single nasal. Eyelids developed, 

 lower with a transparent disk composed of one or several scales. 

 Ear exposed. Limbs well developed, pentadactyle. Dorsal lepidosis 

 composed of small scales intermixed with large keeled ones forming 

 longitudinal series ; ventral plates large, squarish, forming regular 

 longitudinal and transverse series. A collar fold. Males with fe- 

 moral pores, females with a few praeanal pores only. Tail compressed, 

 with a double denticulated keel superiorly. 



South America. 



1. Neusticurus bicarinatns. 



Custa bicarinata, Gray, Cat. p. 25. 

 Lacerta bicarinata, Linn. S. N. i. p. 361. 

 Dracfena bioarinata, Guer. Icon. R. A., Rept. pi. iii. fig. 2. 

 Neusticurus bicarinatns, Dam. c^- Bibr. v. p. 64. 



Snont pointed ; can thus rostralis very strong ; the diameter of the 

 ear-opening about half that of the eye. Transparent disk of lower 

 eyelid composed of several pieces. Head-shields : a pair of fronto- 

 nasals, a pair of prgefrontals, a small azygos shield at the intersection 

 of the four latter ; a frontal, slightly grooved medially ; a pair of 

 frontoparietals and an interparietal, of subequal size, the latter further 

 back than the former ; occipital region with small irregular shields ; 

 four supraoculars, anterior more or less divided ; a lorcal ; a row of 

 six infraorbitals ; a row of granules between the loreal and anterior 

 infraorbital and the labials ; latter, six or seven upper and four 

 lower ; chin-shields, one anterior and four pairs, Oular scales rather 



