86 TESTUDINID A. 
Carapace moderately depressed, with three obtuse, interrupted 
keels in the young; the lateral keels usually disappearing in the 
adult ; the shields smooth or concentrically striated ; nuchal as broad 
as long, or longer than broad ; first vertebral broader anteriorly than 
posteriorly ; second and third vertebrals as long as broad, or broader 
Skull of Ocadia sinensis, (From Gray, P. Z. 8. 1873.) 
than long ; posterior margin not serrated. Hind lobe of plastron 
notched, narrower than the opening of the shell, as long as or a little 
shorter than the width of the bridge ; the longest median suture is 
that between the abdominal shields, the shortest that between the 
humerals ; the length of the suture between the pectorals equals or 
exceeds that of the gulars and humerals together; inguinal and 
axillary large. Head rather small; snout obliquely truncate, 
rather strongly projecting: upper jaw not hooked, feebly notched 
mesially ; both jaws with finely denticulated edge ; alveolar surface 
of upper jaw broad all round, with a feeble, slightiy tuberculate 
median ridge; the width of the mandible at the symphysis much 
less than the horizontal diameter of the orbit. Digits broadly 
webbed, ‘Tail about two thirds the length of the shell in the young, 
half in the males, two fifths in the females. Carapace olive-brown, 
