12. G0NT0CEPHALT7S. 13. ACANTHOSATIRA. 299 



Fore lunb 85 miUim. 



Hind limb 140 „ 



Tail 405 „ 



Birma ; Malay peninsula ; Sumatra ; Borneo. 



a,h. cJ . Eangoon. Dr. J. E. Gray [P.]. (Types.) 



c. Skeleton. Rangoon. Dr. J. E. Gray [P.J. 



d. S ' Penang. Dr. Cantor. 

 e-f.S- Nias. Hr. Sandemann [C.]. 

 g. (S- Matang, 



A, i. cJ $ . Indian archipelago. Dr. Bleeker. 



13. ACANTHOSAURA. 



Acanthosaura, Gray, Oriff. Anim. Kingd. ix. Syn. p. 56, and Cat. 



Liz. p. 240 ; Fitzing. Syst. Rept. p. 44 ; Gilnth. Rept. Brit. Ind. 



p. 147 ; Stoliczka, Journ. As. Soc. Beng. xli. 1872, p. 110. 

 Lophyrus, part., Dum. <^ Bihr. iv. p. 410. 

 Onocalotes, Gunth. I. c. p. 146. 

 Oriotiaris, Gunth. I. c. p. 150. 

 Charasia, part., Stoliczka, I. c. , 



Tympanum distinct. Body generally compressed, limbs more or 

 less elongate. Dorsal scales heterogeneous, small or moderate. A 

 dorsal crest. No gular fold, but a more or less distinct oblique fold in 

 front of the shoulder. No gular sac. No prseanal or femoral pores. 



South-Eastern Asia. 



Synopsis of the Species. 



I. Nuchal crest separated from dorsal. 



A. No spine on the side of the neck. 



A long postorbital spine 1. copra, p. 300. 



B. A spine on each side of the neck. 



Postorbital and nuchal spines nearly as 



long as the diameter of the orbit .... 2. armata, p. 301. 

 Postorbital spine half the diameter of 



the orbit 3. crucigera, p. 302. 



Postorbital spine not half the diameter 



of the orbit 4. lamnidentata, p. 302. 



II. Nuchal and dorsal crests continuous. 

 A. A spine on each side of the neck. 



The small dorsal scales much smaller 



than the ventrals 5. coronata, p. 303. 



The smaller dorsal scales larger than the 



ventrals 6. minor, p. 304. 



