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upper mandible decurved, distinctly notched ; length of tarsi one 

 inch and an eighth. Adult in summer with the head, upper portion 

 of the neck in front, hind neck, and all the upper parts blackish 

 brown ; ends of the secondaries, outer primaries toward their bases, 

 and a ring round the eye, white. In winter, the throat, upper part 

 of the sides of the neck, and the entire fore neck, white. Length 

 eighteen inches, wing eight. 



During winter this species is occasionally met with along the 

 shores of Long Island. According to Mr. Audubon, it breeds on 

 the rocky islands of the Gulf of St. Lawrence, Newfoundland, and 

 Labrador. The eggs, eight of which I have before me, are laro-e 

 for the size of the bird, and differ materially in colcr, and somewhat 

 in form. They are all more or less blotched with brownish-black • 

 the ground color in some is dark green, in others pale blue and 

 yellowish-brown, and in one specimen in my possession, white 

 with the dark-colored markings confined almost exclusively to the 

 great end. It is said to inhabit the Arctic seas of both continents 

 passes most of its time at sea, and feeds on fish, which it procures 

 by diving. During the breeding season it suffers itself to be seized 

 by the hand, or killed on the spot, rather than desert its favorite 

 cliff — hence the name " Foolish Guillemot." 



The Large-billed Guillemot, [Uria BrunnicMi] I have never 

 seen. From the description given, it can be distinguished from the 

 first species, by having the upper mandible three times as long as 

 broad ; [the upper mandible of U. troile is more than four times as 

 long as broad] and one inch greater in length. In the description 

 given of its plumage, we notice that it differs only from U. troile by 

 wanting the white ring round the eye. The dimensions from tip 

 to tip of expanded wings, is said to be thirty inches in both species. 



URIA GRYLLE— LINN. 

 BLACK GUILLEMOT. 



Uria Grylle, Bonapart. 



Uria Grylle, Black Guillemot, Nuttall. 



Black Guillemot, Uria Grylle, Audubon. 



Specific Character — Bill black, rather slender, from the corner 



of the mouth to the point one inch and five eighths ; length of tarsi 



48 



