28 



Fig. 12. 



INTRODUCTION. 



web, d, always broader. Most feathers have 

 a little additional or accessory feather, of a 

 downy texture, attached. Thus in Fig. 12, 

 a c is the feather, b the plumule. The lat- 

 ter is largely developed in the Gallinaceous 

 birds, and wanting entirely in the Pigeons. 

 The ordinary terminology applied to the leaves 

 of plants is that which I adopt for distin- 



guishing the forms of feathers. Thus, 



Fig. 13. Fig. 14. 



Fig. 15. 



Ovate, having the outline of an egg, Fig. 13. 



Lanceolate, tapering at both ends, Fig. 14. 



Linear, with the edges parallel, Fig. 15. 



Abrupt, cut even at the end, Fig. 16. 



Rounded, having the extremity broadly rounded, Fig. 17. 



Obtuse, narrowly rounded, Fig. 13, 15. 



Acute, sharp -pointed, Fig. 14. 



Acuminate, with a long taper point, Fig. 19. 



Abrupt and Acuminate, Fig. 18. 



Emarginate, having a notch at the end, Fig. 20. 



Fig. 16. Fig. 17. Fig. 18. Fig. 19. 



Fig. 20. 



~^~v'Y 7 ~ 



The Wing varies in length and breadth. Thus, it is short, 

 broad, convex, and rounded, in Grouse and Partridges, Fig. 



