206 AGAMIS^, 



Hypsilurus macrolepis, Peters, Mon. Berl. Ac. 1872, p. 775. 

 Tiaris longii, Mackay, Proc. Linn. Soc. N. S. W. ii. 1878, p. 103. 



Snout longer than the diameter of the orbit; canthus rostralis 

 and supraciliary edge angular, not projecting ; occiput concave ; 

 tympanum a little larger than the eye-opening; cheeks strongly 

 swollen under the ear in the males. Upper head-scales very small, 

 equal, sharply keeled ; occipital enlarged ; ten to twelve upper and 

 nine or ten lower labials. Gular sac moderately large, not serrated 

 anteriorly ; median gular scales enlarged and smooth, posterior very 

 small and keeled; some strongly enlarged flat scales below the 

 tympanum. Nuchal crest subcontinuous with the dorsal (a notch 

 separating them) ; in the male it is formed of compressed lobes, the 

 anterior the smallest, inserted on an elevated dermal fold covered 

 with very small Iceeled scales turned upwards ; the longest spines of 

 the nuchal crest equal the greatest diameter of the tympanum ; 

 dorsal crest similar to the nuchal, but a little higher, its base sup- 

 ported by the greatly developed processes of the vertebrae. In the 

 females and young the crests little developed. Dorsal scales small, 

 equal, strongly keeled, with the points directed upwards and back- 

 wards ; ventral scales moderate, very strongly keeled. Limbs above 

 with equal strongly keeled scales ; third and fourth fingers nearly 

 equal ; the adpressed hind limb reaches the anterior border of the 

 orbit, or the tip of the snout. Tail strongly compressed, in the 

 males with a high crest on its basal portion, covered with keeled 

 scales which are larger inferiorly ; its length more than three times 

 that of head and body. Young greenish olive, uniform or with dark 

 cross bars ; adult dark brown, with more or less distinct yellowish 

 cross bars. 



Total length 1030 miUim. 



Head 65 



Width of head 55 



Body 170 



Fore limb 120 



Hind limb 195 



TaU 800 



New Ireland, New Britain, Solomon, and Fiji Islands ; Northern 

 Queensland. 



a-d. S ? • I>iike of York Island. Rev. G. Brown [C.]. 



e. cJ . New Ireland. 



f-h. c? & hgr. Solomon Islands. G. Krefft, Esq. 

 i-k. Hgr. «& yg. Treasury Island. . H. B. Guppy, Esq. [P.]. 



I, m, n. Hgr. & yg. Santa Anna Island. H, B. Guppy, Esq. [P.j. 



o. Hgr. c? . San Christoval. H.M.S. ' Herald.' 



p. Hgr. cJ • San Cliristoval. Museum Economic Geology. 



q. Yg. San Christoval. J. Brenchley, Esq. [P.]. 



r-t. Yg. Fiji Islands. 



«. Yg. ? J. Macgillivray, Esq. 



Oonyocephalus nigrigularis, Meyer, Mon. Berl. Ac. 1874, p. 129, 

 said to be closely allied to the preceding, is not sufficiently charac- 

 terized to bo placed in the system. — New Guinea. 



