VERTEBRATED ANIMALS. 



149 



282. In the stag (fig. 160), the bones of the fore-arm 

 (c, e?,) are rather longer than that of the arm (b), and the 

 radius no longer turns upon the ulna, fig. 160. 



but is blended with it ; the metacarpal 

 or cannon-bone (/), is greatly deve- 

 loped ; 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. 



283. In the arm of the lion (fig. 161), 

 the arm bone (6) is stouter, the carpal bones 

 (<?) are less numerous, and the fingers (/") 

 are short, and armed with strong, retrac- 

 tile claws (#). In the whale (fig. 162), the 

 bones of the arm (6) and fore-arm (c, c/,) are 

 much shortened, and very massive ; the 

 hand is broad, the fingers (g} strong, and 

 distant from each other. In the bat (fig. 

 1 63), the thumb, which is represented by a 

 small hook, is entirely free, but the fingers 

 Fie. 161. Fig. 162. 



-ft 



Fig. 163. 



Fig. 164. 



are elongated in a disproportionate manner, and the skin is 

 stretched across them, so as to serve the purpose of a 



wing. 



