lOI 



A gular sac with serrated anterior edge, covered with smooth 

 scales. Body strongly compressed ; nuchal and dorsal crests 

 continuous, almost equal, beginning between the posterior border 

 of the orbits, its height not quite the diameter of the orbit; 

 it is composed of triangular scales, covered at the base with 

 large quadrangular ones. Dorsal scales small, equal, smooth, 

 slightly imbricate; ventral scales large and smooth. Tail strongly 

 compressed, a serrated edge above and covered with smooth 

 scales except two inferior series, which are larger and strongly 

 keeled; it measures one time and a half the length of head and 

 body. Limbs slender, the adpressed hind limb reaches the 

 orbit; third and fourth fingers equal. 



Olive-brown or greenish above, with dark spots on each 

 side of the back; tail with dark annuli. Young ones with dark 

 spots round the eye, on the lips, and a dark gular fold. Length 

 of head and body 131 mm.; tail 200 mm. 



Habitat: Borneo (Tandjong!, Sarawak!, Mt. Buri on Sa- 

 dong river). 



2. Gonyocephalus kuhli (Schleg.). 



Lophyrus Kuhlii^ Schlegel, Bijdr. lot de Dierk, I 1848, p. 5^ pl- H- 

 Gonyocephalus kuhlii^ Boulenger, Cat. Liz. I 1885, p. 286. 



Snout about as long as the diameter of the orbit ; canthus 

 rostralis sharp ; supraciliary borders strongly raised, angular 

 posteriorly; tympanum a little smaller than the eye-opening. 

 Head-scales small, unequal, keeled ; a few enlarged tubercles 

 round the ear-opening; eleven to thirteen upper and lower 

 labials. Gular sac moderate, with a serrated anterior edge and 

 covered with small keeled scales. Body compressed ; nuchal 

 and dorsal crests continuous, former beginning at the occiput 

 and composed of triangular scales as long as the diameter of 

 the eye-opening, with two rows of keeled smaller ones at the 

 base; dorsal crest much lower. Dorsal scales small, smooth, 

 the points directed upwards, with irregularly scattered enlarged 

 ones; ventral scales larger, keeled. Tail compressed, with a 

 serrated upper edge and covered with feebly keeled scales, 

 the inferior largest and strongly keeled ; its length one time 

 and three fourths the length of head and body. Limbs long, 

 slender, the hind limb reaches the eye; scales of limbs unequal, 

 keeled ; third and fourth fmgers equal. 



