﻿BONES OF THE LEG AND WING OF BIRDS. 



175 



the flesh from a chicken's or a turkey's wing, he may observe 

 these bones easily enough. The bones of the wrist and 

 hand, however, seem to be few in number and curiously 

 grown together. 



carpus \ 



metacarpus 



phalanges 



Fig. 153. — Eight Wing of an Adult Bird seen from the Insidh.— IT, Humerus; B, Ra- 

 dius; U, Ulna. 



157. If, however, a young bird is taken from the egg 

 before the parts are fully formed, the bones of the wing 

 will be found separate and distinct, and the relation be- 

 tween the wing of the bird and the fore-leg of other verte- 

 brates becomes more fully apparent. 



So constant are the characters of these parts in all birds, 

 that a robin, a sparrow, a pigeon, or a chicken, will reveal 

 the parts quite as distinctly as the larger birds. 



In the embryo bird, that is, a bird while still in the egg, 

 the wing and leg appear far more alike than in the adult, as 

 may be seen by looking at the following figures of embryo 

 birds : 



