THE STORY OF THE CASSOWARIES WING. 



In the young bird the degenerate Hight feathers have a typical barrel, or quill, 

 and feebly developed shaft and " vane," as in the left-hand figures in the inset. 

 I^ater, the shaft and vane sloughs off, and the hollow quill becomes solid, as in the [ 

 large upper figure. The small wing is that of the Apteryx, in which the shaft and j 

 ^ane are retained through life. 



3:54] 



