13, ACANTHOSATTRA. 301 



2. Acanthosaura armata. (Plate XXII. fig. 1.) 



Acanthosaura armata, Oray, Cat. p. 240. 

 Agama armata, G^'ay, Zool. Journ. iii. 1827, p. 216. 

 Calotes lepidogaster, Cuv. R. A. 2nd ed. ii. p. 39. 

 Acanthosaura armata, Gray, Griff. A. K. ix. Syn. p. 66 ; Gunth. 



Eept. Brit. Ind. p. 148. 

 Lophyrus armatus, D^m. (§• -BiSr, p. 413; Cantor, Cat. Mai. Rept. 



p. 32. 

 Gonyocephalus (Acanthosaura) armatus, Fitz. Syst. Rept. p. 44. 



Snout as long as, or slightly shorter than, the diameter of the 

 orbit ; canthus rostralis and supraciliary edge angular ; tympanum 

 nearly as large as the eye-opening ; upper head-scales keeled, much 

 larger on the supraorbital region ; a long spine, measuring from 

 three fourths to once the diameter of the orbit, terminates the 

 supraciliary edge ; eleven to thirteen upper and thirteen to fifteen 

 lower labials ; gular scales strongly keeled, much smaller than the 

 ventrals. An oblique fold on each side of the neck, in front of the 

 shoulder ; a large spine, of the same size as the postorbital, on each 

 side of the nape above the tympanum. Nuchal crest not continuous 

 with the dorsal, composed of large compressed spines, as long as the 

 postorbital ones, with the base concealed by two or three rows of 

 smaller spines. Dorsal crest anteriorly as high as the nuchal, be- 

 coming very low behind. Dorsal scales extremely small, all with 

 the points directed upwards, intermixed with irregularly scattered, 

 enlarged, rhomboidal strongly keeled scales ; ventral scales a little 

 larger than the enlarged dorsals, strongly keeled. Fore limb and 

 tibia above with equal keeled scales, femur with unequal ones ; 

 fourth finger very slightly longer than third ; the hind limb stretched 

 forwards reaches between the temple and the nostril. Tail com- 

 pressed, once and one fourth to once and a half as long as head and 

 body, covered with uniform strongly keeled scales, which are larger 

 inferiorly. Brownish above, with round lighter spots, or light with 

 irregular dark spots ; some dark lines radiate from the eye ; an 

 oblique dark-brown band down each side of the neck, from the 

 interruption between the nuchal and dorsal crests, to the throat. 



Total length 298 millim. 



Head 33 „ 



Width of head 26 „ 



Body 105 „ 



Fore limb 73 „ 



Hind Hmb 101 „ 



Tail 160 „ 



Singapore ; Penang ; Tenasserim ; Siam ; Cochin China. 



o, 6. 5 & hgr. Singapore. Gen. Hardwicke [P.]. (Types.) 



c. 2 . Singapore. 



d-e. S $ • Penang. ' Dr. Cantor. 



/. (S . Chartaboum. M. Mouhot [C.]. 



