125 



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

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



1 1 . 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 



i) The specimen is in the Amsterdam Museum. 



