84 



ORGANS OF LOCOMOTION. 



174. In the stag, (Fig. 35,) the bones of the fore-arm 

 are rather longer than that of the arm, and the radius no 

 longer turns upon the ulna, but is blended with it; the meta- 

 carpal, or. cannon bone, is greatly developed ; and, being 

 quite as long as the fore-arm, it is apt to be mistaken for it. 

 The fingers are reduced to two, each of which is surrounded 

 by a hoof, at its extremity. 



175. In the arm of the lion, (Fig. 36,) the arm bone is 



Fig. 36. 



stouter, the carpal bones are less numerous, and the fingers 

 are short, and armed with strong, retractile claws. In the 

 whale, (Fig. 37,) the bones of the arm and fore-arm are 

 much shortened, and very massive; the hand is broad, the 

 fingers strong, and distant from each other. 



Fig. 38. 



Fig. 39. 



In the bat, the thumb, which is represented by a small 

 hook, is entirely free, (Fig. 38 ;) but the fingers are elon- 

 gated in a disproportionate manner, and the skin is stretched 



