282 AGAMIDiB. 



Ceylon. 



Body 122 miUim. 



Fore limb 80 „ 



Hind limb 105 „ 



Tail 170 „ 



o, b, c-d. cJ 2 . Ceylon. 



e. Skin. ? Sir A. Smith [P.]. 



/. Skeleton. Ceylon. 



ff. Skull. Ceylon. 



12. GONYOCEPHALUS. 



Gonyocephalus, Kaup, Isis, 1825, p. 590 and 1827, p. 614 ; Wagler, 

 St/st. Amph. p. 160 ; Wiegm. Herp. Mex. p. 14 ; Fitzing. Syst. 

 Rept. p. 45 ; Gray, Cat. p. 230. 



Lophyrus {Dum.), Fitzing. N. Class. Rept. p. 17. 



Lophyrus, part, (non Latr.), Dum. >§• Bibr. iv. p. 410. 



Lophosaurus, Fitz. Syst. Rept. p. 45. 



Dilophyrus, Gray, I. c. p. 238 ; Giinth. Rept. Brit. Ind. p. 136. 



Tiaris, Gray, I. c. p. 239 ; Giinth. I. c. p. 151. 



Coryphophylax (Fitz.), Steindachn. Novara, Rept. p. 30. 



Hypsilurus, Peters, Mon. Berl. Ac. 1867, p. 707. 



Arua, Doria, Ann. Mm. Genov. vi. 1874^ p. 345. 



Lophosteus, Peters <§• Doria, Ann. Mus. Genov. xiii. 1878, p. 377. 



Tympanum distinct. Body compressed. Dorsal scales small, 

 uniform or intermixed with enlarged ones. A dorsal crest, A 

 strong transverse gular fold. Males with a gular sac. No praeanal 

 or femoral pores. 



East Indies, Papuasia and Polynesia, from the Nicobars and 

 Andamans to the Fiji Islands ; North-eastern Australia. 



Synopsis of the Species. 



I. Supraciliaxy border strongly raised, forming an angular projection 

 posteriorly. 



A. Dorsal crest almost as much 



developed as the nuchal 1. dorioe, p. 284. 



B. Dorsal crest much less developed than the nuchal. 



Ventral scales perfectly smooth ; nuchal 

 crest not higher than the snout is 

 long, extending forwards to the 

 occiput 2. chamcdeontinus, p. 285. 



Ventral scales keeled 3. kuMii, p. 286. 



Ventral scales perfectly smooth ; nu- 

 chal crest higher than the snout is 

 long, extending forwards to the in- 

 terorbital region 4. sumatranus^ p. 286. 



