304 



Halmahera. — Malay Peninsula; Singapore; Penang; Burma; 

 Siam; Cochin China; Philippines. 

 Semiaquatic. 



8. Notochelys Gray. 

 (Gray, Proc. Zool. Soc. London p. 177, 1863). 



Head covered with small shields on the hind part only. 

 Skull with a bony temporal arch; postorbital arch broad; 

 alveolar surfaces without median ridge; choanae between the 

 eyes. Neural plates hexagonal, short-sided posteriorly; six or 

 more vertebra^l shields. Plastron united to the carapace by 

 ligament movable between the hyo- and hypoplastron. Digits 

 broadly webbed; fore limb with five, hind limb with four 

 sharp claws. Tail short. 



Distribution. Malay Peninsula; Sumatra; Borneo; Philippines. 



A single species. 



I. Notochelys platynota (Gray). 



Emys platynota^ Gray, Proc. Zool. Soc. London 1834, p. 54. 

 Cydemys platynota^ Boulenger, Cat. Chel. 1889, p. 130 (s. syn.). 

 Notochelys platynota^ Siebenrock, Zool. Jahrb. Suppl. X 1909, p. 504. 



Carapace depressed, angular, with an obtuse, interrupted 

 keel, flat on the vertebral region; posterior margin serrated; 



six or seven vertebral shields, 

 which are much more broad 

 than long (except the first), as 

 broad as the costals. Plastron 

 narrower than the opening of 

 the shell, openly emarginate be- 

 hind; bridge distinct, its width 

 is contained two times and a 

 half to two times and two thirds 

 in the length of the plastron; no 

 distinct transverse hinge ; suture 

 between the pectoral and the 

 marginals longer than that 

 between the abdominal and 

 Fig. 114. Notochelys platynota (Gray), the marginals; pectoral suture 

 oung specimen, X 76- ^g long as or a little shorter 



than abdominal suture; inguinal shield large. Head covered 

 with smooth skin and small shields on its posterior part; upper 



