382 TEIID^. 



large, median smallest, smooth or indistinctly keeled ; a row of six 

 or seven large collar-plates. Smaller dorsal scales irregular, slightly 

 imbricate, feebly keeled ; the larger seales strongly keeled, also sub- 

 imbricate, forming six longitudinal series on the back, the two outer 

 on each side in contact ; the two median series may be less distinct 

 and interrupted. Abdominal plates rounded posteriorly, in about 

 ten longitudinal and twenty-six transverse series ; the plates on the 

 six median longitudinal rows smooth, the others keeled and passing 

 gradually into the scaling of the flanks ; the plates of the two median 

 rows narrower. Three large praeanal j)lates, one antero-median and 

 two postero-lateral ; a small plate between the latter. Upper limb- 

 scales imbricate, keeled. Females with three or four praeanal pores 

 on each side ; [males with thirty femoral pores on each side]. 

 Caudal scales forming regular aunuli, the lateral strongly keeled ; 

 the large dorsal scales continued to the upper surface of the tail, 

 where they form first four and then two denticulated crests. Olive- 

 brown above, spotted with dark brown, with more or less distinct 

 whitish ocelli on the flanks ; three vertical dark brown bars on the 

 upper eyelid and supercilium ; lower surfaces whitish, throat and 

 belly immaculate. 



millim. millim. 



Total length 270 From end of snout to 



Head 22 vent 90 



Width of head 12 Fore limb 30 



From end of snout to Hind limb 43 



fore limb 38 Tail 180 



Brazil. 



a,h. 2 . S. America. 



c. Yg. Interior of Brazil. 



2, Neusticurus ecpleopus. 



Custa bicarinata («o« X.), Giinth. Proc. Zool. Soc. 1859, p. 404. 

 Neusticurus ecpleopus, Cope, Journ. Ac. Philad. (2) viii. 1876, p. 161 ; 

 O'Shaughn. Ann. ^ Mag. N. H. (5) iv. 1879, p. 295. 



Compared with the preceding, this species has a shorter and more 

 obtuse snout ; ear-opening much larger, almost as large as the eye. 

 Transparent disk of lower eyelid undivided. Frontonasals frequently 

 united ; no azygos shield between the latter and the prsefrontals ; 

 interparietal much larger than parietals ; no granules between the 

 loreal and labials ; five or six upper and four or five lower labials ; 

 anterior gular scales large, roundish. Nape granular, with about 

 eight longitudinal series of roundish, keeled or subcorneal tubercles ; 

 enlarged dorsal scales more tubercular, with more elevated keels ; 

 they form four equidistant longitudinal series on the back ; flanks 

 with regular vertical folds, which support mingled small and large 

 scales. Abdominal plates perfectly square, in eight longitudinal and 

 twenty transverse series ; plates of the outer series smaller, keeled, 

 of the median series as large as the others. Anterior large pi-aeanal 



