11. cLemmys. 101 
Neural plates hexagonal, short-sided in front. Plastron exten- 
sively united to the carapace by suture, with short axillary and 
inguinal buttresses, just reaching the first and fifth costals respec- 
tively ; entoplastron intersected by the humero-pectoral suture. 
Skull with a bony temporal arch ; alveolar surfaces without median 
ridge ; choane between the eyes. Upper surface of head covered 
with undivided skin. Digits more or less distinctly webbed. Tail 
moderate in the adult, long in the young. 
South Europe, North-west Africa, South-western Asia, China, 
Japan, North America. 
Skull of Clemmys insculpta. (From Gray, P. Z. 8, 1869.) 
Synopsis of the Species. 
I. The median suture between the anal shields shorter than that 
between the femorals. 
Upper jaw notched mesially, finely den- 
ticmlated sera 66. cc's cle cus cs So eran 1. caspica, p. 103. 
Upper jaw notched mesially, not denticu- 
lleyraGl 56 deathen eos miaeaa one a cap cape Oackar 2. leprosa, p. 105. 
Upper jaw not notched .............. 3. japonica, p. 106. 
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