sharp; supraciliary border normal; tympanum distinct, much 

 smaller than the eye-opening. Head-scales small, keeled; those 

 on the supraocular region largest; a few tubercles below the 

 ear-opening; ten upper and nine lower labials. A gular sac, 

 without a serrated anterior edge, covered with feebly keeled 

 scales. Body compressed ; nuchal and dorsal crests continuous, 

 formed of long, narrow scales, covered with two or three 

 rows of sharply pointed, smaller ones at the base; its height 

 exceeds the length of the snout. Dorsal scales with a longi- 

 tudinal series of enlarged ones, rest of scales equal; ventral 

 scales feebly keeled. Tail compressed, covered with keeled 

 scales; a low crest of pointed scales at the base; its length 

 more than twice that of head and body. Limbs with equal, 

 strongly keeled scales; the hind limb reaches the eye; third 

 and fourth fingers equal. 



Olive-brown above, with a brown network, enclosing round 

 greenish spots; dark streaks radiating from the eye; limbs 

 and tail with dark annuli. Lower parts unspotted. Length of 

 head and body 124 mm.; tail 295 mm. 



Habitat: Borneo! (Labuan, Sandakan Bay!, Merabah, Mt. 

 Dulit, Balingeau). 



io. Gonyocephalus megalepis (Blkr.). 



Lophyrus megalepis^ Bleeker, Nat. Tijdschr. Nederl. Ind. XX 1 860, p. 327. 

 Tiar is tuber culatus^ Giinther, Proc. ZooJ. Soc. London 1872, p. 593, pi. XXXVIII. 

 Gonyocephalus tuberculatus, Boulenger, Cat. Liz. I 1885, p. 291. 

 Gonyocephalus megalepis, Boulenger, Ann. Nat. Hist. (5) XX 1887, p. 152. 



Snout a little longer than the diameter of the orbit; canthus 

 rostralis sharp, projecting; supraciliary border normally raised ; 

 tympanum smaller than the eye-opening; occiput concave. 

 Head-scales small, unequal, strengly keeled; behind the ear a 

 few enlarged tubercles, the lower one largest; twelve upper 

 and ten lower labials. Gular sac moderately large, without 

 serrated edge, and covered with smooth scales. Body com- 

 pressed ; nuchal crest separated from dorsal, a little higher 

 than the length of the snout and formed of large lanceolate 

 scales directed backwards, the anterior small, covered at the 

 base by a fold of the skin with three or four rows of keeled 

 scales; dorsal crest as high as posterior part of nuchal, with 

 a single row of keeled scales at the base. In females the crest 

 is much lower. Dorsal scales small, smooth or keeled, with 



