GENERAL ZOOLOGY 



Fig. 18.20. Modern chelonians, terrestrial and aquatic. A, common box tortoise, Terrapene 

 Carolina. B, a soft-shelled tortoise, Amyda spimjera. C, a marine turtle, Carelta. {A 

 and B, photographs courtesy New York Zoological Society; C, underwater photograph by 

 John F. Storr.) 



570 



