CHELONIBES. EMYD^. SB'] 



Family 2. EMYDiE. River or Emys Turtles. 



Feet palmated, the toes distinctly separated ; claws long, 

 acuminated, five upon the anterior and four upon the 

 hinder feet; nostrils pervious; jaws horny; body de- 

 pressed, covered with corneous plates, those on the 

 sternum eleven or twelve. 



Cistuda Gray. Box Terrapins. Sternum very wide, the 

 extremities rounded, divided across by a cartilaginous 

 suture, and only connected to the carapace, or dorsal 

 shell, in the same way ; the two divisions of the ster- 

 num are thus moveable on the same axis, and can be 

 closed so as entirely to conceal the enclosed animal. 

 C. Europeea. Sch. Fish. pi. 1. Gray, Synop. pL 19. 



Ejiys Brong., Gray. Sternum dilated, large, and 



solid ; anterior portion truncated, posterior bifid ; the 



symphysis broad, bony, and covered with six pair of 



hard shields. 



spinosa. Ind. Zool. ii. Sprengleri. Shaw, Zool. iii. 1. pi. 9. 



KiNosTERNON Spix'. Stemum rather wide, rounded in 

 front, and sometimes slightly bilobed behind, and 

 composed of eleven plates only ; the front and hinder 

 lobes articulated on the central lobe ; symphysis nar- 

 row ; inguinal plates long, but very narrow. 

 K. Pensylvanicum. Gray, Syn. 6. f. 4. odoratum, Ib.f. 1 .p. 36. 



Sternotherus Bell. Sternum wide, with the front, and 



sometimes the hinder lobes moveable ; jaws horny. 



C. castaneus. Bell, Zool. Journ. ii. pi. 14. 



Chehdina Fitz. Sternum remarkably broad; shell 

 much depressed ; neck very long. 



C. longicollis Gray. Shaw, Zool. of N. Holl. pi. 7. 



Hydraspis Bell. Sternum narrow, solid, much re- 

 sembling that of Kinosternon, but the symphysis is 

 broader ; the intergular plate smaU and marginal ; 

 ' head broad, depressed, and covered with one or more 

 large plates ; nostrils short and tubular ; neck large 

 and warty ; chin with two beards. 



H. sub-rufa. Lac. pi. 12. 

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