24 



TESTUDINID^l. 



without bony temporal arch ; alveolar surfaces narrow, without 

 median ridge. Upper surface of head covered with undivided skin. 

 Digits with a short web. Tail very short, not longer in the young 

 than in the adult. 



Distribution. Burma, Malay Peninsula and Archipelago. 



Three species are known. Habits terrestrial or semiaquatic. 



Fig. 8. Shell of Geoemyda grandis. 



Synopsis of the Species. 



A. Anterior margin of shell serrated ; second verte- 



bral shield at least as broad as the second 



costal, much broader than long O. spinosa, p. 25. 



B. Anterior margin of shell not serrated; second 



vertebral shield narrower than the second 

 costal, not much broader than long. 



a. Carapace arched or tectiform in a transverse 



section O. grandis, p. 25. 



b. Carapace much depressed, flat on the vertebral 



region G. depressa, p. 25. 



