124 AGAMID^E. 



130. Gonyocephalus grandis. 



Pilophyrus grandis, Gray, Cat. Liz. p. 239 ; Cantor, J. A. S. B. xvi, 

 1847, p. 640, pi. xx ; Gunth. Kept. B. I. p. 136 ; Theob. Cat. p. 103. 

 Gonyocephalus grandis, Bouleng. Cat. Liz. i, p. 298. 



Snout longer than diameter of orbit; cant bus rostralis and 

 supraciliary edge sharp, projecting ; tympanum nearly as large as 

 eye-opening ; upper head-scales very small, bluntly keeled, enlarged 

 on the canthus rostralis and the supraciliary and supraorbital 

 borders ; one or two enlarged tubercles on each side behind the 

 occiput ; 10 to 12 upper and as many lower labials. Gular sac 

 moderately large, without serrated anterior edge ; gular scales 

 smaller than ventrals, smooth. Nuchal and dorsal crests subcon- 

 tinuous, separated by a deep notch, composed of long lanceolate 

 spines united together, free only at the tips, with smaller triangular 

 smooth spines at the base : in the male, the height of the nuchal 

 crest nearly equals the length of the snout, and the dorsal crest is a 

 little lower ; in the female, the former is scarcely developed and 

 the latter is reduced to a slight serration. Dorsal scales very 

 small, with the points directed upwards and backwards ; ventral 

 scales rather small, smooth. Limbs above with equal smooth or 

 very feebly keeled scales ; third and fourth fingers equal ; the ad- 

 pressed hind limb reaches to between the eye and the tip of the 

 snout. Tail strongly compressed, with sharp serrated upper edge ; 

 caudal scales smooth, with two rows enlarged and strongly keeled 

 beneath ; the length of the tail about 2^ times that of head 

 and body. Brown or olive above, with or without darker cross 

 bands ; flanks with roundish yellow spots ; throat sometimes with 

 blue lines. 



From snout to vent 6 inches ; tail 16. 



Hob. Pegu, Malay Peninsula, Sumatra, Borneo. The occurrence 

 of this species in Pegu strongly needs confirmation. 



Genus ACANTHOSAURA, 

 Gray, Griff. A. K. ix, Syn. p. 56, 1831. 



Tympanum distinct. Body generally compressed, limbs more or 

 less elongate. Dorsal scales heterogeneous, small or moderate. A 

 dorsal crest. No gular fold, but a more or less distinct oblique 

 fold in front of the shoulder. No gular sac. No pra3anal or 

 femoral pores. 



Distribution. South-eastern Asia. 9 species are known. 



Synopsis of Indian and Burmese Species. 



A . Nuchal crest separated from dorsal. 



a. Spine between eye and tympanum nearly 



as long as diameter of orbit A. armata, p. 125. 



6. The spine not more than half diameter of 



orbit A. crucigera, p. 125. 



c. Postorbital spine ^ to f diameter of orbit . . A. lamnidentata, p. 126. 



