NELLY DE ROOY. REPTILES. 1 37 



10. Gonyocephalus nigrigularis Meyer. 



Meyer, Mon. Berl. Ac. 1874, p. 129. 



Sauvage, Bull. Soc. Philom. (7) III 1879, p. 51. 



Boulenger, Transact. Zool. Soc. London XX 1914, p. 255, pi. XXVIII fig. 3. 



de Roov, Indo-Austr. Rept. I 1915, p. ni. 



Sabang on Lorentz River 1907, 1 spec. 



Alkmaar 1907, 3 spec. (2 young ones). 



Bivak Island 1907, 1 spec. 



Rain Island 1907, 1 spec. 



Alkmaar 1909, 3 spec. (1 young one). 



River Camp 1909, 1 young spec. 



Bivak Island 1909, 2 young spec. 



Lorentz River 1909, 2 young spec. 



Kloof Camp 1912, 1 young spec. 



Sabang on Lorentz River 191 2, 1 young spec. 



This species and the next are closely allied, they differ on the follovving characteristics : 

 Gular scales smooth ; dorsal crest lower than nuchal ; tympanum smaller than eye-opening ; 



gular fold black or grey G. nigrigularis. 



Posterior gular scales keeled ; dorsal crest higher than nuchal ; tympanum larger than 

 eye-opening G. godeffroyi. 



Not having been sufticiently described by Meyer in 1874 and only mentioned by Sauvage 

 in 1879, it was discovered again in the expéditions to New Guinea and redescribed by Boulenger in 

 19 14, who gave a figure of the head. It is found along the north coast as well as the south 

 coast of the island, but up till now knovvn in the Dutch part only. The colour is of a 

 beautiful green tinge, on the back there are seven or eight black transverse bars, each bar 

 with a short green band in the middle ; the head is olive, the enlarged flat scales on the 

 cheeks and a row of large scales below the eye whitish ; the nuchal crest is olive or greenish ; 

 limbs and tail hâve -transverse black bands. The belly is greenish or yellowish; throat some- 

 times black-spotted and the posterior part of the gular sac and the gular fold dark grey or 

 black. It reaches a length of 880 mm. 



An egg of this species measured 34 by 16 mm. 



1 1 . Gonyocephalus godeffroyi (Ptrs.). 



Boulenger, Cat. Liz. I 1885, p. 295. 



de Rooy, Indo-Austr. Rept. I 1915, p. 112. 



Bivak Island 1912, 1 spec. 



In opposition to G. nigrigularis this species is rare in New Guinea, being only known 



rom the Lorentz River in one spécimen and from Stephansort. It occurs more eastwards in 



différent groups of islands and is found in N. Queensland. 



The spécimen from Bivak Island is olive-brown with lighter transverse bands and spotted 



ail over with black ; the large flat scales below the ear are yellowish ; its lower parts are yellowish ; 



iris spotted with red. Length of head and body 226 mm.; tail 733 mm. 



12. Gonyocephalus modestus Meyer. 



Boulenger, Cat. Liz. I 1885, p. 294. 



de Rooy, Indo-Austr. Rept. I 1915, p. 113. 



