122 AGAMID^B. 



scattered on the flanks. Ventral scales moderate, strongly keeled. 

 Limbs with keeled scales, with enlarged tubercles on the thighs ; 

 the adpressed hind limb reaches the neck or the temple. Tail 

 strongly compressed, with a crest similar to the dorsal ; upper cau- 

 dal scales unequal, feebly keeled, lower equal and strongly keeled ; 

 the length of the tail nearly equals that of the head and body. 

 Greenish above, whitish beneath. 



From snout to vent 7 inches ; tail 7. 



Hob. The Kandian provinces. 



Genus GONYOCEPHALUS, 

 Kaup, Isis, 1825, p. 590. 



Tympanum distinct. Body compressed. Dorsal scales small, 

 uniform or intermixed with enlarged ones. A dorsal crest. A 

 strong transverse gular fold. Males with a gular sac. No prseanal 

 or femoral pores. 



Distribution. East Indies, Papuasia, Polynesia, North-eastern 

 Australia. 



25 species are known, only four of which have to be dealt with in 

 this work. 



Synopsis of Indian and Burmese Species. 



A. Ventral and gular scales keeled. 



a. Limbs above with subequal scales ; longest 



spines of nuchal crest shorter than greatest 



diameter of tympanum G. subcristatus, p. 122. 



b. Limbs above with unequal scales; nuchal 



crest much higher than dorsal G. humii. p. 123. 



B. Ventral scales keeled, gulars smooth G. bellii, p. 123. 



C. Ventral and gular scales smooth G. grandis, p. 124. 



127. Gonyocephalus subcristatus. 



Tiaris subcristata, Blyth, J. A. S. B. xxix, 1861, p. 109 ; Theob. Cat. 



p. 112. 

 Gonyocephalus subcristatus, Bouleng. Cat. Liz. i, p. 292. 



Snout longer than diameter of orbit ; canthus rostralis and supra- 

 ciliary edge sharp ; tympanum nearly as large as eye-opening ; 

 upper head-scales of unequal size, strongly keeled ; a few enlarged 

 tubercles on back of head ; 7 or 8 upper and as many lower labials. 

 Gular sac very small ; gular scales smaller than ventrals, keeled. 

 Nuchal crest not continuous with dorsal, formed of triangular 

 spines, the longest of which measures less than diameter of eye- 

 opening, inserted on a slight fold of the skin ; dorsal crest a serrated 

 ridge. Dorsal scales small, keeled, the points directed upwards and 

 backwards, a few scales enlarged, irregularly scattered ; ventral 

 scales rather small, strongly keeled. Limbs above with subequal 

 keeled scales; third and fourth fingers equal; the adpressed hind limb 



