300 



Habitat: Batu Islands ; Sumatra (Serdang in Deli); Borneo. — 

 Philippines; S. China; Loo Choo Islands; Annam. 

 Semiaquatic. 



2. Geoemyda spinosa (Gray). 



Emys spinosa^ Gray, Syn. Rept. 1831, p. 20. 



Geoemyda spinosa^ Boulenger, Cat. Cliel. 1889, p. 137 (s. syn.). 



Heosemys spinosa^ Siebenrock, Zool. Jahrb. Suppl. X 1909, p. 506. 



Carapace much depressed, with a broad flat vertebral region 

 and an obtuse keel; margin serrated anteriorly and posteriorly ; 

 young specimens with a short keel or spinose tubercle on 

 each costal shield, each marginal ending in a spine, with or 

 without small denticulations, and a strong vertebral keel. Nuchal 

 shield more long than broad; second to fourth vertebrals much 



Fig. III. Geoemyda spinosa (Gray). 



more broad than long, at least as broad as the costals. Plastron 

 large, truncate anteriorly, angularly notched behind; width of 

 bridge almost equals the length of the hind lobe; suture between 

 the abdominals and that between the pectorals about equal; 

 axillary and inguinal shields present. Head covered with undiv- 

 ided skin; upper jaw, emarginate in the middle, bicuspid. 

 Fore limb with five claws, hind limb with four, digits shortly 

 webbed. Tail very short. 



