15. CrCLEMTS. 131 



spots on each costal ; plastron yellow with brown spots, or brown 

 with the sutures between the shields yellow. Head yellowish 

 brown ; neck brown, with irregular yellowish streaks, the broadest 

 of which extends from the posterior corner of the eye. 



Length of shell 2-1 ceutim. 



Sumatra, Borneo, Malay Peninsula, Mergui. 



a. Ad., stffd. Sumatra. (Type.) 



6. Yg., spir. Baiika. br. JBleeker ( C'/6'^m</o 



hankanensis) . 

 c-e. Ilgr. & yg-., spir. Sarawak. A. Everett, Esq. [C.]. 



/, ^, h. Ad., stftd. Singapore. A. R. Wallace, Esq. [P.]. 



e, h. Hgr. & yg., shells. Singapore. A. R. Wallace, Esq. [P.]. 



2. Cyclemys dhor. 



Emys dhor, part.. Gray, Syn. Rcpt. p. 23 (1831). 



Cyclemys orbiculata. Bell, rruc. ZooL Soc. 1834, p. 17, and Mon. 



'Test. p. — , pis. xxiv., XXV. (1842) ; Gray, Proc. ZooL Sue. 1863, 



p. 178 ; Theob. Journ. Linn. Soc. x. p. 12 (1870). 

 Emys dentata, Gray, III. Ind. Zool. ii. pi. Iviii. fig. 2 (1834). 

 Cistudd diardii, Dam. ^- Bihr. ii. p. 227 (1835). 



dentata, Gray, Cat. Tort. p. 32 (1844). 



Euiys diardii, Schleg. Verhand. Natuurk. Afbeeld. p. 44, figs. 6 & 7 



(1849). 

 Cyclemys dentata, Gray, Cat. Sh, Itept. i. p. 42, pi. xix. (1855) ; 



Jcrdon, Proc. As. Soc. Beng. 1870, p. 68 ; Theob. Cat. Rept. Brit. 



Ind. p. 8 (1876). 

 Emys dhor, Strauch, Chelon. Stud. p. 28 (1862), and Verth. Schildkr. 



p. 58 (1865). 

 Cyclemys oldhamii, Gray, Proc. Zool, Soc. 1863, p. 178 ; Giinth. 



Rept^ Brit. Ltd. p. 15, pi. v. tig. B (1864) ; Gray, Siq)pl. Cat. Sh. 



Rept. i. p. 23 (1870). 

 ovata, Gray, Proc. Zool. Soc. 1863, p. 178, and Suppl. Cut. Sh. 



Rept. i. p. 23. 



beUii, Gray, Proc. Zool. Soc. 1863, p. 179. 



Cistudo orbiculata, Giehel, Zeitschr. f. yes. Naturw. xxvii. p. 13 



(1866). 

 Cyclemys dhor. Gray, Suppl. Cat. Sh. Rept. i. p. 23. 



Carapace depressed, with a single, obtuse keel ; posterior margin 

 serrated ; vertebral shields as broad as long or broader than long, 

 narrower than the costals. Plastron narrower than the opening of 

 the shell, hind lobe angularly notched, connected with the carapace 

 by a distinct bridge, the width of which is contained twice and 

 three fourths to three times in the length of the plastron ; the hyo- 

 and hypoplastral bones contribute to a nearly equal degree to the 

 formation of the bridge ; the transverse hinge between the hyo- 

 and hypoplastrals, which does not correspond with the curved suture 

 between the pectoral and abdominal shields, is only developed in 

 adult specimens ; a small inguinal shield may be present ; the suture 

 between the pectoral shield and the marginals shorter than that 

 between the abdominal and the marginals ; the longest median 

 suture is that between the pectorals. Hook of upper jaw bicuspid. 



L 



