382 TEIIDE. 
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 preanal plates, one antero-median and 
two postero-lateral ; a small plate between the latter. Upper limb- 
scales imbricate, keeled. Females with three or four preanal pores 
on each side; [males with thirty femoral pores on each side]. 
Caudal scales forming regular annuli, 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 
Heads 5 oe ee een 22 MOU soe icon ecn a ase 90 
Width ofhead .... 12 Fore limb ........ 30 
From end of snout to Hind limb........ 43 
fore limb ...... 38 Tail gerade 180 
Brazil. 
a,b. Q. S. America. 
ce. Yg. Interior of Brazil. 
2. Neusticurus ecpleopus. 
Custa bicarinata (non L.), 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 preefrontals ; 
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 subconical 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 preanal 
