EXTERNAL ANATOMY. — TAIL. 
Ill 
in scansorial types, — the Sylviadoi and the FTingillidcB 
for instance, — we esteem it as the first indication of the 
scansorial structure. 
(103.) The form of the tip or termination of tail 
feathers, as will appear from what has just been said, is 
of much importance, as attbrding both generic and spe- 
cific characters. Some of these forms have been already 
noticed ; and we shall now briefly enumerate the chief 
of those which remain, shortly defining the whole. 
The point or tip of tlie tail feathers, are either, 1. 
truncate, the feathers appearing as if abruptly cut off or 
squared, as in hampornis holosericeus (Jig. 58. a) and the 
genus Trogon (b) ; 2. oval, when the end represents one 
extremity of an egg (d) ; 3.pointed or lanceolate. (/), where 
there is a gradual diminution to the tip of the shaft, as 
