105 



Habitat: Natuna Islands (Pulu Laut, Gr. Natuna!). — 

 Malacca. 



7. Gonyocephalus beyschlagi Boettger. 



Goiiyoccphalus beyschlagi^ Boettger, Ber. Offenb. Ver. Naturk. 29 — 32 1892, p. 104. 

 Gonyocephalus beyschlagi^ Werner, Verb. Ges. Wien XLVI 1896, p. 12, Taf. i 

 fig. 5; Zool. Jahrb. Syst. XIII 1900, p. 484. 



Snout much longer than the diameter of the orbit ; canthus 

 rostralis sharp, projecting; supraciliary border sharp, normal; 

 tympanum distinct, half the diameter of the eye. Head-scales 

 large, unequal, slightly rugose, keeled; a series of enlarged 

 ones on the forehead, yl^ -shaped ; ten to twelve upper and ten 

 to eleven lower labials. Gular sac moderate, without serrated 

 anterior edge, covered with obtusely keeled or pointed scales; 

 throat with enlarged tubercles scattered between the small 

 scales. Body compressed; nuchal and dorsal crests continuous, 

 almost equal, slightly notched on the nape ; it has about half 

 the height of the body, continued at the base of the tail 

 and formed of sharply pointed united lobes, covered at the 

 base with two or three rows of scales. Dorsal scales minute, 

 conical, pointing upwards; a regular longitudinal series of 

 enlarged tubercles on each side ; ventral scales rather large, 

 smooth. Tail strongly compressed, with a high crest on its 

 base, which ends at about 20 mm. ; upper caudal scales feebly 

 keeled, lower larger and the two inferior series strongly keeled; 

 its length about two times and a half that of head and body. 

 Limbs with equal, keeled scales; the hind limb reaches beyond 

 the tip of the snout; fourth finger a little longer than 

 third. 



Greenish-grey above, with a longitudinal yellowish-white 

 streak on the nape above the tympanum, an oblique light 

 streak near the axilla; row of tubercles along the back whitish; 

 flanks with a dark network, including large yellow spots. 

 Limbs with narrow light bands and light keels of the scales 

 tail with eleven light and dark annuli. Lower parts yellowish 

 throat somewhat darker. Length of head and body 116 mm. 

 tail 277 mm. (Not seen by my). 



Habitat: Sumatra (Upper and Lower Langkat, Deli), 



