13. ACANTH08AT7RA. 303 



opening ; upper head-scales keeled, larger on the supraorbital region ; 

 a spine, measuring two fifths the diameter of the orbit, terminates 

 the supraciliary edge ; ten or eleven upper and eleven or twelve 

 lower labials ; gular scales strongly keeled, smaller than the ventrals. 

 An oblique fold down each side of the neck, in front of the shoulder ; 

 a spine a little shorter than the postorbital on each side of the nape 

 above the tympanum. Nuchal crest not contiauous with the dorsal, 

 composed of compressed triangular scales, the longest of which equal 

 the postorbital spine ; the spines at the base of the nuchal crest 

 small. Dorsal crest very low, formed of triangular scales, gradually 

 decreasing in size posteriorly, where it is reduced to a slight denti- 

 culation. Dorsal scales extremely small, with the points directed 

 upwards, intermixed with irregularly scattered, enlarged, rhomboidal 

 strongly keeled scales ; ventral scales 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 adpressed hind limb reaches the eye or the 

 nostril. Tail compressed, once and two thirds or once and three 

 fourths as long as head and bodjf, covered with uniform strongly 

 keeled scales, which are larger inferiorly. Brownish-olive above, 

 with roundish lighter spots, or with a series of large dark-brown 

 spots on each side of the back ; a large dark-brown marking on the 

 nape, widening anteriorly ; hind limbs and tail with dark transverse 

 bars. 



Total length 280 milUm. 



Head 28 



Width of head 20 



Body 82 



Fore limb 57 



Hind limb 92 



Tail 170 



Pegu; Tenasserim. 



a. J. Pegu. W. Theobald, Esq. [O.J 



6. 2 . Tenasserim. Col. Beddome [0.]. 



5. Acanthosaura coronata. 



Acanthosaura coronata, Qimth. Proc. Zool. Soc. 1861, p. 187, and 

 Mept. Brit. Ind. p. 149, pi. xiv. fig. E. 



Snout as long as the diameter of the orbit; oanthus rostralis 

 angular ; supraciliary edge very prominent, serrated behind ; tym- 

 panum smaller than the eye-opening ; upper head-scales keeled, a 

 little larger on the supraorbital region ; a very small conical tubercle 

 or spine behind the supraciliary edge ; eleven upper and eleven or 

 twelve lower labials ; gular scales much smaller than the ventrals, 

 strongly keeled. An oblique fold on each side in front of the 

 shoulder. A small spine, shorter than the greatest diameter of 



