91 



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 limVjs, 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 

 subtymppanal scale is constant. 



