no 



lower, so that the dorsal one is only a serrated ridge. Dorsal 

 scales very small, equal; ventral scales larger, smooth. Tail 

 compressed with a serrated edge above and covered with smooth 

 scales except the two inferior series, which are enlarged and 

 keeled; its length two times and a half that of head and body 

 or more. Limbs long, slender, covered with equal smooth (or 

 faintly keeled) scales; the hind limb reaches beyond the eye; 

 third and fourth fingers equal. 



Brown or olive above, uniform or with dark transverse bands; 

 flanks with pale brown or yellowish round spots. Females and 

 young ones have a dark band behind the eye, through the ear, 

 edged with light and meeting its fellow. Lower parts brownish 

 or yellowish; throat sometimes with dark lines. Length of 

 head and body 155 mm.; tail 405 mm. 



Habitat: Nias!; Mentawei Islands (Sipora); Sumatra (DeH!, 

 Singkarah!); Borneo (Baram river, Matang, Mt. Dulit, Pankalan 

 ampat, Simanggang, Kuching, Sarawak, Upper-Mahakkam river!, 

 Sandakan). — Malacca; Rangoon?. 



13. Gonyocephalus binotatus Meyer. 



Gonyocephalus (Hypsilurus) binotatus^ Meyer, Mon. Berl. Ac. 1874, p. 130. 

 Gonyocephalus binotatus^ Boulenger, Cat. Liz. I 1885, p. 295. 



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

 rostralis not very sharp; supraciliary borders normally raised; 

 tympanum large, as large as the eye-opening. Head-scales 

 small, subequal, keeled; no enlarged scales on the temple; the 

 ear-opening bordered anteriorly by slightly larger scales; a 

 group of large flat white plates below the ear; eleven or twelve 

 upper and lower labials. Gular sac moderate, without serrated 

 edge and covered with small keeled scales intermixed with 

 larger ones, the scales becoming smaller posteriorly. Body 

 strongly compressed; nuchal and dorsal crests continuous, 

 beginning at the occiput, formed of rather small scales, in- 

 serted on a fold of the skin, as long as the diameter of the 

 eye-opening on the nape, decreasing posteriorly. Dorsal scales 

 small, equal, keeled, the points directed upwards; ventral scales 

 a little larger, keeled. Tail strongly compressed, with a serrated 

 edge above and covered with small keeled scales, the inferior 

 larger and strongly keeled; its length more than thrice the 

 length of head and body. Limbs long, slender, covered with 



