102 IGUANIDZ, 
irregular, unequal, smooth, the enlarged ones sometimes feebly 
keeled; ventral scales moderately large, strongly keeled, imbricate, 
arranged in transverse series. Limbs long, covered with very large 
keeled scales; the adpressed hind limb reaches the tip of the snout 
or a little beyond. Tail more than twice as long as head and body, 
slender, compressed, above with feebly keeled scales, inferiorly with 
larger strongly keeled ones. Olive- or reddish-brown above, with 
irregular blackish-brown spots or cross bands; a white spot on the 
elbow and another at the base of the arm; blackish streaks radiate 
from the eye, extending down to the lower lip, one directed obliquely 
towards the lower border of the tympanum and another to its upper 
border; lower surfaces pale brown, with a few darker spots. 
Total length .............- 338 millim. 
Head (to extremity of helmet). 53 _,, 
Width of head .......... By FARO «5s 
Body 4 ich reut ete ganna 73s, 
Fore lini 2 sadayesnehke- dee BQ <5, 
Hind mb ey: seavaeae coe 98 Cs, 
nal at bee peraqeike Gare eee 235—C,, 
Guatemala to Costa Rica. 
a-b. So. Vera Paz. O. Salvin, Esq. fey 
c 2. Costa Rica. O. Salvin, Esq. [C.]. 
d. Yg. Costa Rica. 
2. Corythophanes percarinatus. 
Corythophanes percarinatus, 4. Dum. Arch. Mus. viii. p. 518, pl. xx. 
fig. 8; Bocourt, Miss, Se. Mex., Rept. p. 120, pl. xvii. fig. 2. 
The upper surface of the head constricted behind the supraciliary 
ridge; the parietal ridges uniting only a short distance in front of 
the extremity of the helmet; nostril equally distant from the orbit 
and the tip of the snout; upper head-scales keeled or striated; a 
short series of enlarged keeled scales from the orbit to above the 
tympanum, the posterior projecting, tubercle-like. Gular scales 
elongate, strongly kecled, forming longitudinal series, separated by 
granules; a strong crest of triangular scales along the throat. 
Nuchal crest with serrated edge, descending gradually from the 
cranial crest to the serrated dorsal ridge. A more or less distinct 
fold along each side of the back. Dorso-lateral scales irregular, 
unequal, all the larger ones distinctly keeled; ventral scales large, 
strongly keeled. Limbs as in the preceding. All the caudal scales 
strongly keeled. Olive-brown above, with irregular blackish-brown 
spots or cross bands; broad black bands radiating from the eye, not 
extending beyond the orbit, except one which reaches the anterior 
border of the tympanum; lower surfaces whitish olive. 
Total length................ 300 millim. 
Head (to extremity of helmet). 42 
” 
