MIGRATION AND FLIGHT. 91 



allow, some of the most prominent external as well as internal 

 peculiarities of birds, we shall now proceed to the considera- 

 tion of the various species in detail, following pretty nearly 

 the arrangement already given in the Tables of Classification, 

 and inserting additional observations and anecdotes to illus- 

 trate those subjects on which we have already touched. 



