262 



VERTEBIIATE ANIMALS. 



shoulder-blade is placed inside the I'ibs instead of outside, as is 

 usually the case. 



The Clielonia are conveniently divided into groups, according as 

 the limbs are adapted for swimming (natatory), or for progression 

 on land (terrestrial) ; or, again, enable the animal to lead an amphib- 

 ious life, sometimes on land and sometimes in the water. Of the 



Fig. 187.— Skeleton ami carapace of the Logger -headed Turtle (Chelone caoimnna), 

 viewed from below, the plastron being removed. 



strictly aquatic forms the best known are the edible Green Turtle 

 (Chelii/ie nv/diix) and the Hawk's-bill Turtle {Chelone imhriiata). 

 The former is found abundantly in many of the seas of warm 

 climates, and is largely imported into Eurojie as a delicacy. The 

 latter (fig. 187) is truly a native of warm seas, though an occasional 

 straggler has reached Britain. It is of comparatively small size — 

 not more than about three feet in length— but is of considerable 



