PLATE LV. 



Class AVES. 



THE PIGEON (Coluniba). 

 FIG. 1. PIGEON, x i. 



FIG. 2. HEAD, x 1. 



a. auditory opening : c. cere : n. nostril. 



FIG. 3. FEATHER : VENTRAL ASPECT, x 1. 



c. calamus or tube, and r. rachis or shaft, constituting the scapus or 

 stem : v. vane composed of barbs : i. inferior umbilicus : 

 s. superior umbilicus. 



FIG. 4. PART OF A FEATHER, x 1 5. 



r. rachis : &. barb : lr. barbules with booklets attached. 



