194 



WHITE-WINGED CROSSBILL. 



dilated forms a crop of vast size, c d, which lies 

 chiefly on the right side of the neck, but also passes 

 behind so as to appear on the left side. This form 

 occurs equally in the Common Crossbill, and seems 

 to be peculiar to this genus. The greatest breadth of 

 the crop is 10 twelfths. On entering the thorax, the 

 oesophagus contracts to 2 twelfths. The proventri- 

 culus, e, is bulbiform, with a diameter of 3 twelfths. 

 The stomach, f, is a strong gizzard of rather small 

 size, somewhat bent in the same manner as that of the 

 Pine Grosbeak, 4f twelfths long, 6 twelfths broad; its 

 muscles distinct; the cuticular lining very firm but 

 thin, longitudinally rugous, and of a light red colour. 

 The intestine, g h ij k, is 10J inches long, its greatest 

 diameter 2 twelfths, its least 1-J twelfths. The rectum, 

 j k, is 1 inch 2 twelfths long, including the cloaca. 

 The cceca,y, are lij twelfths long, and i twelfth broad. 



The trachea is 1 inch 9 twelfths long, 1-| twelfths 

 broad at the upper part, gradually diminishing to 1 

 twelfth; its rings firm, and about 75 in number. The 

 inferior laryngeal muscles are large. The bronchi 

 are formed of about 15 half-rings. 



The twigs represented in the plate are those of a 

 species of alder common in Newfoundland. 



Gexus XIV.— CORYDALINA, Mid. LARK-FINCH. 



Bill of the same form as in the Guiraca, but smaller, and approaching to 

 that of Dolichonyx, being short, robust, conical, a little compressed; upper 

 mandible a little narrower, with the dorsal line very slightly convex, the 

 ridge indistinct, the nasal sinus very broad and short, the sides convex, the 

 edges ascending for a third of their length, then direct, the notches almost 

 obsolete, the tip narrow: lower mandible with the angle short and very 



