KINOSTERNON PENNSYLVANICUM. 131 



Fleming* next placed it in the genus Cistuda, established by himself, with the 

 Cistuda Carolina, &c.; but here the anatomical characters are greatly at variance;! 

 for in the Kinosternon Pennsylvanicum, as seen above, the sternum consists of 

 three parts, the central section fixed, the anterior and posterior movable; while in 

 the genus Cistuda the sternum has but two valves, both equally movable on the 

 same axis. 



Spix afterwards established the genus Kinosternon upon the characters given 

 above for a South American tortoise, under which the animal here described 

 ranges very well. 



* Philosophy of Zoology, vol. ii. p. 270. 



f See the anatomical part of this work for a full description of the anatomy of this genus. 



