CTCLEMTS. 



29 



Tlie ligamentous transverse hinge, dividing the plastron into 

 an anterior and a posterior moiety, may be indistinct, and is nearly 

 ah\ays so in quite young specimens. These may, ho^^•ever, be 

 readily distinguished from young of the preceding genus by the 

 hooked upper jaw. 



Fig. 10. — Shell of Cyclemys amboinensis. 



Synojysis of Burmese Sjjecies. 



A. Plasti'ou emargiuate posteriorly ; posterior 



margin of carapace serrated. 

 a. Suture between pectoral shield and mar- 

 ginals longer than that between abdomi- 

 nal and marginals C. phdynota, p. 30. 



h. Suture between pectoral and marginals 

 shorter than that between abdominal and 

 marginals. 



a'. Carapace unicarinate C. dhor, p. 30. 



h'. Carapace tricarinate ^ C. mouhoti^ p. 31. 



B. Plastron not notched posteriorly ; carapace 



tricarinate in the young ; posterior margin 



not serrated C. amboinensis^ p. 31. 



