11. CLEMMTS. 



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 humoro-pectoral suture. 

 Skull with a bony temporal arch ; alveolar surfaces without median 

 ridge ; choante 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, Xorth-west Africa, South-western Asia, China, 

 Japan, North America. 



Fig. 29. 



Skull of Clemmys inscidpta. (from Gray, P. Z. S. 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- 

 ticulated 1. caspica, p. 103. 



Upper jaw notched mesially, not denticu- 

 lated 2. leprosa, p. 105. 



Upper jaw not notched 3. japonica, p. 106. 



I 2 



