m 
MR. A. W. E. 0*8tIAU6HN&SBV ON 
[Feb. 1, 
scales Riifl in the single later/il sertes of large scales, M, Bocourt'g 
description particiilarizfa deux raiigees longitudinales de chaqvie 
cote de la crete dorsale and bis figure of the general scutellatioii 
of the sides indicateij about 29 scales vertically between the belly 
and the dorsal crest, and larger scales interrmited with these every- 
where. 
Sexual characters are well shown in the series of specimen;) before 
irie. 
The male has a larger bead find longer bind limbi^^ reacliing to 
the eye, while in the female tlicy do not extend beyond tht? tym- 
pantim. A. different system of coloration also prevails, the female 
being of darker browui^h and more variegated tints and without the 
dark gular patch. 
16. Enyauius pk^taqius, sp, n. (Plate XXV, fig, I.) 
Head broad, with rounded and projecting lateral border of about 
20 canthal and superciliary scales in a continnous series, almost 
uniform in shajie and size. Entire upper snrface of the head 
covered with very convex or poiivted and erect scales, larger iu the 
eresceutic series bordering the supraorbital region ; larger conical 
scales above the temporal region. Su|)ralabirtls 10, infratabiaU 9, 
uniform. Gular scales convex, elongate, the central erect. The 
back and sides of the body are covertxl with snndl almost uniform 
pointed and keeled sciles, from HA to 40 in a vertical series between 
the abdominal scales and tlie dorsal crest. Only a single very in- 
distinct lateral aeries of lurger scales on each side, A longitudinal 
crest of conical erect scales from the najie, along the median line of 
the back, and continued anteriorly on tbe tail, where it gives place 
to ft double row or keel of pointed scales. Scales of the ventral 
surface small, uniform^ smooth on the chest, antl very feebly keeled 
on the middle of the abdomen; of the iimba small and keeled. A 
single femoral pore in a large scale on each side. Tail compressed, 
ringed with small keeled scales on the sides and larger bencatb. 
Female with a shorter head than the male, and eotisiderably 
larger scales on the sides of the body. The male also has the tail 
much thicker at its root and longer hind limbs, reaching to the eye, 
while those of the female reach only to the anterior border of the 
ear-opening. 
Ground-colour of the upper regions of the body, m the male, 
reddish, very finely speckled with green ; posterior gular region 
and gular fold black ; lower surfaces yellowish. The female has 
the ground-colour above dark brown, thickly dotted over with green; 
tail brown- and yellnw-ringed ; lower surfaces yellowish, without 
gular pateb. A yellow spot on a patch of conic^il scales behind the 
ear in both sexes. 
miUim, 
Total length (of male) 318 
Distance between end of snout and ear-opening , . 34 
„ „ fore iiinb , . h6 
