THE COW-PEH-BIRD. 
23 
twelfths. The coeca, 1 inch distant from the extremity, are 3 twelfths long, 
£ twelfth in diameter. 
The trachea is 2 inches 2 twelfths long, rather wide 
in proportion to the size of the bird, although not 
more than 1§ twelfths in diameter. The rings are 
58 ; the bronchial half rings about 15. The lateral 
muscles are moderate ; the sterno-tracheal extremely 
slender. There are four pairs of inferior laryngeal 
muscles, as in all the singing birds, whether thick- 
billed or not. 
The digestive organs of this bird are in all respects 
precisely similar to those of the Finches, Grosbeaks, 
Buntings, and other allied genera. 
The oesophagus, abed, is considerably dilated on 
the neck; the stomach, e, is a strong muscular gizzard, 
having the lateral muscles large and distinct, the lower 
prominent, the epithelium longitudinally rugous. The 
intestine, of which the commencement only is here 
represented, f g, is rather short and of moderate 
width. The coeca are an inch distant from the ex- 
tremity, and about a quarter of an inch in length ; 
and the rectum forms only a slight dilatation in place 
of a cloaca. 
f 
A 
A 
9 
