60 



ORGANS OF LOCOMOTION. 



succeed those of the wrist ; five fingers of unequal length, 

 one of which, the thumb, is opposed to the four others. 



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

 greatly prevail in length over that of the arm, and the radius 

 no longer turns upon the ulna, but is blended with it ; but it 

 is especially the metacarpal or cannon-bone, which 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. 

 e 



Fig. 38. 



Fig. 39. 



In the bat, (Fig. 38), the fingers, with the exception of the 

 thumb, which is represented by a small hook, are elongated 

 in a disproportionate manner, and across them the skin is 



