12. GONXOCEPHALtrS. 297 



23. Gonyocephalus papuensis. 



Tiaris papuensis, Macleay, Proo. Linn, Soc. iV. S. W. ii. 1878, p. 101. 

 Gonyocephalus (Lophosteus) albertisii, Peters 8f Doria, Ann. Mus, 

 Genov. xiii. 1878, p. 377. 



Snout longer than the diameter of the orbit ; canthus rostralis 

 and supraciliary edge angular, not projecting ; occiput concave ; 

 tympanum much larger than the eye-opening ; cheeks strongly 

 swollen under the ear. Upper head-scales very small, equal, keeled ; 

 occipital enlarged ; twelve upper and ten lower labials. Gular sac 

 moderately large, not serrated anteriorly ; gular scales feebly 

 keeled, becoming very small posteriorly, the largest nearly as large 

 as the ventrals ; some strongly enlarged flat scales below the tym- 

 panum. Nuchal crest well separated from dorsal, formed of com- 

 pressed lobes, the smallest being the anterior, inserted on an elevated 

 dermal fold covered with vqry small feebly keeled scales turned 

 upwards ; the longest spines of the nuchal crest equal the greatest 

 diameter of the tympanum ; dorsal crest similar to, and not higher 

 than, the nuchal, its base supported by the greatly developed 

 spinose processes of the vertebrae. Dorsal scales small, equal, feebly 

 keeled, the superior with the points directed upwards and back- 

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

 equal keeled scales ; third and fourth lingers equal ; the adpressed 

 hind limb reaches the eye. Tail strongly compressed, with a high 

 upper crest on its basal portion, covered with keeled scales which 

 are larger inferiorly ; its length more than three times that of head 

 and body. Whitish above, tinged with reddish, and with brown 

 vermiculations ; upper part of nape, and a spot on each side of the 

 neck, brown ; throat with wide-meshed brown reticulation. 



Total length 680 millim. 



Head 40 „ 



Width of head 28 „ 



Body 120 „ 



Pore limb 85 „ 



Hind limb 140 „ 



Tail 520 „ 



New Guinea. 



a. (S . Aley a, S.E. New Guinea. 



24. Gonyoceplialiis boydii. 



Tiaris boydii, Macleay, Froc. Linn. Soc. 3f. S. W. viii. 1884, p. 432. 



Snout triangular and shelving ; upper surface of head a little 

 concave, covered with minute roughly keeled scales ; scales largest 

 below the mouth, expanding behind the ear into a few ivory-looking 

 tubercles of larger size. Gular pouch covered with very minute 

 pointed cales, with broad, pointed, compressed, triangular teeth 



