282 AGAMID^. 



Body 122 miUim. 



Fore limb 80 „ 



Hind limb 105 „ 



Tail 170 „ 



Ceylon. 



Sir A. Smith [P.]. 



12. GONYOCEPHALUS. 



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

 Syst. Amph. p. 150; Wiegni. Herp. Mex. p. 14; Fitzing. Syst. 

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



LophyTUs (Dum.), Fitzing. JV. Class. Sept. p. 17. 



Loptyrus, part, (non Latr.), Dum. Sr Bibr. iv. p. 410. 



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



Dilophyrus, Oray, I. c. p. 238 ; GfUnth. Rept. Brit. Ind. p. 136. 



Tiaris, Oray, I e. p. 239 ; Oiinth. I. c. p. 151. 



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



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



Arua, Doria, Ann. Mus. Genov. vi. 1874, p. 345. 



Lophosteus, Peters ^ Boria, Ann. Mus. Genov. xiii. 1878, p. 877. 



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 prseanal 

 or femoral pores. 



East Indies, Papuasia and Polynesia, from the Nicobars and 

 Andamans to the Kji Islands ; North-eastern Australia. 



Synopsis of the Species. 



I. Supraciliary border strongly raised, forming an angular projection 

 posteriorly. , 



A. Dorsal crest almost as much 



developed as the nuchal 1. dorice, 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. chamceleontinus, p. 285. 



Ventral scales keeled 3. huhlii, 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. 



