324 URIA TJIOILI-:. 



of tlie Celtic Sea, and along tlie coasts of Ireland and tlie 

 western side of Ijritain. It apjiears to occur but very rarely 

 in the MeditciTanean. Along the eastern coasts of America, 

 it proceeds, from the extreme north, as far as the Bay of 

 New York. 



Young. — The young, while still covered with down, have 

 the Inll com])aratively short, much compressed, dull flesh- 

 coloured, the tip dusky ; the feet dusky flesh-coloured. The 

 head, throat, hind neck, and the upper parts, are brownish- 

 black, the throat paler ; the lower parts white. There is no 

 Avhite on the secondary quills of the first plumage, which is 

 very lax. 



The first feathers are gradually substituted by a second 

 set, of firmer texture. The quills, their coverts, and the 

 tail-feathers appear first, the secondaries tipped with white. 

 The upper plumage is greyish-black ; the cheeks and tliroat 

 white, as well as all the lower parts. The bill is more elon- 

 gated, and of darker tints, as are the feet. By the end of 

 September the full plumage is obtained. 



YoiTNG IN First Winter. — The bill is shorter, and 

 more slender than in the adult, of a yellowish -broAvn colour, 

 the tips of botli mandibles brownish-black. Tlic feet are dull 

 broAvnish flesh-colour, the webs dusky, the claws blackish- 

 brown. The upper part of the head, the whole of the hind 

 neck, and all the upper parts, of a dull blackish-grey, tinged 

 with brown on the wings, the tips of the secondary quills, 

 the inner four excepted, being, however, white. Continuous 

 with the dark grey of the fore part of the head is a band 

 passing under the eye to about an inch beyond it. The lower 

 l)arts are white ; the sides under the wings streaked with 

 blackish-grey, the long feathers there having broad margins 

 of that colour. The feathers on the upper hind neck are 

 mottled with dull wliite, as are those at the base of the upper 

 mandible. 



I'liOGKEss TOWARD MATURITY. — In S])ring a change com 

 mences, which is completed in June, when the bird acquires 



