18 TESTUDINID^, 



region, which bears a strong bufc obtuse keel ; only the posterior 

 margin serrated. Vertebral shields (1 to 3) not or but slightly 

 broader than long and narrower than the costals ; nuchal longer 

 than broad. Plastron similar to that of G. sjnnosa ; the length of 

 the suture between the pectoral shields at least, two thirds that 

 of the abdominals. Dark brown or blackish above, plastron and 

 lower surface of marginals with black and yellow rays, either the 

 black or the yellow predominating. 



Length of shell 4U0 miliim. 'Z. 



Burma, Siam, Camboja, Mala}"- Peninsula (Penaug, Proy. Wel- 

 lesley, Kedah). 



Genus CYCLEMYS 

 Bell, P. Z. S. 1834, p. 117. 



Neural plates mostly hexagonal, posterior lateral margins 

 shortest. Plastron united to carapace by ligament, with a more 

 or less distinct hinge between liyo- and hypoplastral bones ; 

 humero-pectoral suture crossing the entoplastrou. Skull with a 

 bony temporal arch ; alveolar surfaces without median ridge ; 

 ■choante between the eyes. Greater part of upper surface of head 

 covered with undivided skin. Digits more or less webbed. Tail 

 short. 



Distributed over the greater part of the Oriental j-egion, east 

 of the Bay of Bengal. Terrestrial or semiaquatic ; chiefly 

 herbivorous. 



Sijnopsis of the Sjiecies. 



I. Plastron notched posteriorly ; posterior mar- 



gin of carapace serrated, especially iu the 

 yomig ; carapace uiiicarinate iu the young. 



A. Suture between pectoral shield and mar- 



ginals longer than that between abdo- 

 minal and marginals. 

 G or 7 vertebral sliields ; upper jaw hooked, 



bicuspid, not denticulate C. iilatynota, p. 18. 



5 (rarely 6) vertebral shields ; upper jaw 



strongly hooked, bicuspid, denticulate. ... C annandaUi, p. 19. 



B. Suture between pectoral and marginals 



shorter than that between abdominal 



and marginals C. dhor, p. 20. 



II. Plastron not notched posteriorly ; carapace 



tricarinate in the young, posterior margin 



not serrated C amhoinensis, p. 21. 



14, Cyclemys platynota. 



Emys phdijnota, Gray, P. Z. S. 1834, p. 54 ; Cantor, Journ. ilsiat. 



Soc. Bengal, xvi, p. 609 (1847). 

 Notochelys platynota, Giinth. Kept. Brit. Ind. p. 17 (18G4). 



