CYCLEMTS. 



29 



The ligameutous transverse hinge, dividing the plastron into 

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

 always so in quite young specimens. These may, however, be 

 readily distinguished from young of the preceding genus by the 

 hooked upper jaw. 



Fig. 10. Shell of Cyclemys amboinensis. 



Synopsis of Burmese Species. 



A. Plastron emarginate posteriorly ; posterior 



margin of carapace serrated. 

 a. Suture between pectoral shield and mar- 

 ginals longer than that between abdomi- 

 nal and marginals C. platynota, p. 30. 



6. Suture between pectoral and marginals 

 shorter than that between abdominal and 

 marginals. 



a'. Carapace unicarinate C. d/wr, p. 30. 



b'. Carapace tricarinate , C. mouhoti, p. 31. 



B. Plastron not notched posteriorly ; carapace 



tricarinate in the young ; posterior margin 



not serrated C. amloinensis, p. 31. 



