GO:^YOCEPHALUS. 



67 



very small, bluntly keeled ; one or two enlarged tubercles on each 

 side behind occiput ; 10 to 13 upper and as many lower labials ; 

 gular sac moderately large ; gular scales smooth. -Nuchal and 

 dorsal crests subcontinuous, separated by a deep notch, composed 

 of long lanceolate spines in the male, united together, free only 

 at the tips, with smaller triangular smooth scales at the base; 

 greatest height of nuchal crest often nearly equal to or exceeding 

 length of snout ; crest very low in the female, reduced to a mere 

 serration. Dorsal scales very small, equal, the points directed 

 ■upwards and backwards ; ventral scales rather small, smooth. 

 Limbs above with equal, smooth or very feebly keeled scales ; 

 third and fourth lingers equal ; adpressed hind limb reaching to 

 between eye and tip of snout. Tail strongly compi'essed, with 

 sharp serrated upper edge. Brown or olive above, with or without 

 darker cross bands; flanks with roundish yellow spots ; female 

 .and young with a dark, light-edged band behind eye, meeting, 

 •or nearly meeting, its fellow on scapular region. 



From snout to vent 155 millim. ; tail 405. 



Eangoon (?), Malay Peninsula, Borneo, Sumatra, Nias, Men- 

 tawei. 1 have examined specimens from Penang, Batang Padang 

 (Perak), and Sungei Kongkoi (Jelebu, 1200 feet). 



67. Gonyocephalus robinsonii. 



Bouleng. Journ. Fed. Mai. St. Mas. iii, p. 6o, pi. v (1908). 

 Tympanum smaller than eye-opening, partly covered with 



■J 



-f 



^■ 



Fi"'. 19. — Gonyocephalus rohinsonii. (From Journ. F. M. S. Mas.) 



scales ; upper head-scales small, keeled, unequal in s'ze ; an 

 ■enlarged tubercle behind superciliary edge and others on occiput 



r2 



