73 ANIMAL MECHANISM. 



second, these muscles should be long and slender. This is 

 precisely what takes place ; we can be assured of this, by the 



Fia. 13.— Skeleton of a flaniin2:o (after Alph. Milne-Edwards) ; the wing 

 is very large, the sternum very short and deep, which indicates the size 

 and the shortness of the pectoral muscles. 



