m 
normal size ; occipital scale enlarged ; most of the lateral scales 
of the head enlarged, smooth ; a single enlarged granular scale 
present or absent below the tympanum ; eleven or twelve upper, 
and nine or ten lower labials, each row bordered by a series of 
enlarged smooth scales. Gular sac moderate, with no enlarged 
scales in front; gular scales small and granular, very much 
smaller than the ventrals. Nuchal crest formed of five low widely 
separated triangular scales, the anterior one situated above the 
centre of the tympanum, its height about one-fourth of the length 
of the. snout ; dorsal crest represented by a series of slightly 
enlarged keeled scales ; dorsal scales small and keeled, the points 
being directed upwards and backwards ; ventral scales much 
larger, triangular, keeled. Limbs with strongly keeled scales of 
unequal size ; fourth finger a little longer than the third ; the 
adpressed hind limb reaches to the anterior margin of the eye or 
a little further. Tail feebly compressed anteriorly, more strongly 
so posteriorly, the serrated upper ridge not extending beyond the 
anterior third ; it is long and tapering ; all the caudal scales are 
keeled, and grow larger posteriorly ; the lower series the largest, 
longer than broad, those on the front part terminating in a strong 
spine; tail long and tapering, its length from two and two-fifths 
to two and three-fifths of that of the head and body. Colors — Head 
greenish-olive, the forehead, supraciliary ridge, sides of neck, and 
upper edge of gular sac dark purplish-brown ; lower edge of gular 
sac pale yellow or green, all the intervening space with bands of 
bright yellow and black ; enlarged subtympanal scale yellow ; 
nuchal region green marbled with purple ; nuchal crest pale blue 
or brown ; body from shoulder to groin, and upper surface of 
fore limbs, pale green, the latter faintly cross-banded with yellow ; 
lower surface greenish-white clouded with pale brown ; hind 
limbs above and entire tail purplish-brown, with or without light 
bands. 
From the examination of the five specimens forwarded, the 
above would appear to be the most common coloration, but on 
two of the specimens the general color is purplish-brown with 
scarcely a trace of green, one of these being entirely without 
cross-bands on the limbs and tail, while on the second these 
markings are much accentuated, forming distinct annuli on the 
tail ; in both, however, the coloration of the gular sac and the 
subtymppdinal scale is constant. 
Inches. 
Milliw. 
Total length... 
... 12-80 
... 320 
Length of head 
•95 
24 
Width of head 
■56 
14 
Length of body 
2-70 
67 
Length of fore limb... 
2-00 
50 
Length of hind limb 
3-25 
81 
Length of tail 
915 
... 229 
