SYSTEMATIC ACCOUNT OF THE SPECIES. 145 



Top of head with two curved frontal ridges which converge anteriorly and 

 inclose a shallow frontal depression; head-scales uicluding those of the supra- 

 ocular disc all strongly keeled; supraocular semicircles separated by a single 

 row of scales, three of which are elongate and elevated to form a short median 

 ridge; occipital about the size of the ear opening and separated from the supra- 

 ocular semicircle by two or three rows of scales; supraocular disc composed of 

 eight polygonal keeled scales, separated from the semicircle by a single row of 

 very small granules, polygonal or elongate scales; canthus rostralis composed 

 of few scales, one extremely elongated in the middle of the series, flanked by 

 other less elongate on either side; superciliary ridge consisting of one very long 

 anterior shield, followed by a number of much smaller scales; loreal rows, five; 

 subocular semicircle strongly keeled; supralabials six, suture between fourth 

 and fifth being about under centre of eye; temporal scales small and granular, 

 bordered above by a rather irregular zone of enlarged scales, which extends 

 from the posterior border of the orbit to a point some distance above the ear 

 opening; dorsals small, flat, smooth, showing no tendency to imbricate, a median 

 zone consisting of from three to four series of enlarged more or less distinctly 

 keeled scales; this zone commences at about the region of the fore limbs; ven- 

 trals much larger than dorsals, imbricate and distinctly but not strongly keeled; 

 fore limbs above with rows of very strongly keeled and enlarged scales, similar 

 scales present an anterior aspect of thighs; subdigital expansions feebly devel- 

 oped consisting of about 18 lamellae under phalanges II and III of the fourth 

 toe. Tail strongly compressed with about fifteen evident verticils along its 

 proximal region; such verticil is separated by about seven vertical rows of 

 keeled scales; upper edge feebly serrate, each segment with four small spmes; 

 dewlap very large and capable of great dilation, extending along the midventral 

 line to a point considerably posterior to the line of the axillae ; a very few feebly 

 enlarged postanal scales; no dorsal fold. 



Colour (in Ufe) : — Grayish or reddish brown, variously clouded or spotted 

 with blotches and many bands of dark brown or black, belly pale ashy or green- 

 ish; dewlap fine lustrous maroon. 



Dimensions: — Total length 143 mm. 



Tip of snout to vent 58 nmi. 



Vent to tip of tail 85 mm. 



Tip of snout to ear 17 nun. 



Width of head 10.5 nun. 



Fore leg 26 mm. 



Hind leg 46 nun. 



