284 AaAMiD^. 



Nuchal crest composed of lanceolate lobes; 



dorsal crest distinct; dorsal scales 



with strongly ascending keels; gular 



scales keeled 18. geelvinlcianus, p. 294. 



A black spot on each side of the head, 



involving the ear 19. auritus, p. 295. 



Nuchal and dorsal crests composed of 



lanceolate lobes ; dorsal scales scarcely 



keeled, slightly ascending ; gular scales 



nearly smooth 20. bruijnii, p. 295. 



6. Several strongly enlarged flat scales below the ear. 



a. Anterior border of gular pouch not distinctly toothed ; 

 spines of the dorsal crest not bony. 

 Crest uninterrupted, low ; gular scales 



small, keeled 21. binoiatus, p. 295. 



Crest suboontinuous, notched above 

 the shoulder ; anterior gular scales 



nearly smooth, some enlarged 22. godeffroyi, p. 295. 



Nuchal and dorsal crests separated ; 



gular scales keeled 23. papuensis, p. 297. 



/3. Anterior border of gular 

 'pouch with strong serration 

 formed by large com- 

 pressed triangular scales ; 

 spines of the nuchal and 

 dorsal crests bony 24. hoydii, p. 297. 



2. Ventral scales smooth 25. grandis, p. 298. 



1. GonyocephalTis dorise. 



Gonyocephalus doriae, Peters, Mon. Berl. Ac. 1871, p. 570, and Ann. 

 Mils. Genov. iii. 1872, p. 28, pi. iii. fig. 1. 



Head high, with strongly elevated projecting supraciliary borders 

 forming an angle posteriorly ; canthus rostralis strongly projecting ; 

 snout a little longer than the diameter of the orbit ; tympanum 

 much smaller than the eye-opening ; upper head-scales small, sub- 

 equal, smooth ; no enlarged scales on the temple ; twelve upper and 

 as many lower labials. Gular sac well developed, with serrated 

 anterior edge ; gular scales much smaller than ventrals, smooth. 

 Body very strongly compressed. Nuchal and dorsal crests continuous, 

 the former scarcely higher than the latter, its height equalling 

 nearly the diameter of the orbit ; it begins on a line with the 

 posterior border of the orbit ; the scales of the crest are triangular, 

 with a very regular basal series of large quadrangular ones. 

 Dorsal scales small, equal, roundish or squarish, scarcely imbricate, 

 smooth, without any enlarged ones ; ventral scales large, perfectly 

 smooth. Limbs above with equal smooth scales ; third and fourth 

 fingers equal ; the adpressed hind limb reaches the posterior border 



