( ii ) 



Chaibassia. 

 Characters of Geomyda but a zygomatic arch. 

 Brown above, black below. Keels yellow . . . C. tricarinata. 

 i'AMiLY ClSTUDINID^. 

 Sternum attached by a ligamentous suture, and sometimes 

 transversely divided as well. 



CuoRA. 

 Sternum attached by a ligamentous suture, and divided into 

 two parts. 

 Black, blotched below with primrose yellow. C. Amboinensis. 



Cyclemys. 

 > Sternum attached by a ligamentous suture, and divided in 

 adults by the non-anchylosis of the pectoro-abdominal suture. 

 Young handsomely rayed. Adults uniform. C. dentata. 



Pyxidea. 

 Sternum attached by a ligamentous suture, but entire in adults. 

 Colour yellowish, browner on the sides ... P. Mouhotii. 



Family EMYDID^. 

 Feet webbed. Sternum flat or nearly so in both sexes. 

 Sternum and thorax united into one case. Size small, habits 

 aquatic. Food animal or mixed. 



Bellia. 

 Shell three keeled in the young. Colour uniform. Zygomatic 

 arch strong. 

 Colour uniform brown. Young 3 keeled . . . B. crassicollis. 



Damonia. 

 Shell nodose in the young. Black, yellow spotted. 

 Colour blackish, yellow spotted . . . D. Hamiltonii. 



Melanochelys. 

 Shell 3 keeled. Zygomatic arch slender. 

 Colour brown, keels paler ... M. trijuga. 



Head " red spotted and streaked " . . . M. Sebse. 



Head not spotted. Colour black. Keels 

 yellow ... M. Edeniana. 



