125 



This species is an Indian form and very rare in the Ar- 

 chipelago, having been found only once in Sumatra '). 



n. Acanthosaura Gray. 



(Gray, Griff. An. Kingd. IX Syn. p. 56, 1831). 



Body usually compressed, covered with unequal scales. 

 Tympanum distinct; a dorsal crest. No fold across the throat, 

 no gular sac. A slight oblique fold in front of the shoulder. 

 No praeanal or femoral pores. 



Distribution. South-Eastern Asia; Sumatra. 



A single species. 



i. Acanthosaura armata (Gray). 



Agama armata, Gray, Zool. Journ. Ill 1827, p. 216. 



Acanthosaura armata, Boulenger, Cat. Liz. I 1885, p. 301, pi. XXII, fig. I (s. syn.). 



Snout as long as or slightly shorter than the diameter of 

 the orbit, with angular canthus rostralis and supraciliary edge; 



Fig. 54 Acanthosaura armata (Gray). 



tympanum almost as large as the eye-opening. Head covered 

 with keeled scales, larger on the supraorbital region; a long 

 spine, three fourths of or as long as the diameter of the or- 

 bit, behind the superciliary edge, another on each side of 

 the nape, above the tympanum. Eleven to thirteen upper 

 and twelve to fifteen lower labials. An oblique fold in front 



[) The specimen is in the Amsterdam Museum. 



