INTRODUCTION. 
29 
21 ; long, broad, straight, and pointed, in many Pigeons. 
In the Falcons, it is acuminate, the second quill being longest, 
and the first little shorter ; and in the Swallows is still more 
so, the first quill being longest, and the rest rapidly dimi- 
nished in length. Fig. 22. In the Lark, Fig. 23, it is doubly 
pointed, as it were, the inner secondaries being much elon- 
gated. 
Fig. 21. 
Fig. 23. 
The Tail may be extremely short, short, moderate, long, 
extremely long, and of all intermediate gradations ; even at 
the end. Fig. 24 ; rounded, graduated, or wedge-shaped, 
Fig. 25 ; tapering, pointed, emarginate. Fig. 26 ; or forked, 
Fig. 27. The number of its quills varies from eight to 
