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BLACK-THROATED GUILLEMOT. 



J Uria antiq.ua. 



PLATE CCCCII. Adult and Yodng. 



This species, which is said to occur on the north-west coast of 

 America, has not been met with by me. The figures in the plate were 

 taken from specimens in the Museum of the Zoological Society of Lon- 

 don, by permission of the Coimcil. 



Alca ANTiauA, Ch)iel. Syst. Nat. vol i. p. 654.— iat/s. Ind. Ornitli. vol. ii.p.795. 



Adult. Plate CCCCII. Fig. 1. 



Bill shorter than the head, stout, straightish, compressed toward 

 the end ; upper mandible with the dorsal line declinate and convex, 

 the sides sloping, the edges sharp and overlapping, the tip rather ob- 

 tuse ; lower mandible with the angle long and rather wide, the dorsal 

 outline ascending, straight, the sides sloping outwards and flattened, 

 the edges thin and direct, the tip acute with a slight sinus behind. 



Body full and compact ; neck short and thick ; head rather large, 

 ovate. Feet short, stout, placed far behind ; tibia bare for a short 

 space ; tarsus very short, compressed, covered anteriorly with oblique 

 scutella, behind with angular scales ; hind toe wanting ; anterior toes 

 scutellate, of moderate length, connected by emarginate webs, the in- 

 ner toe much shorter than the outer, which is nearly as long as the 

 middle. Claws rather small, moderately arched, compressed, rather 

 acute. 



Plumage dense, blended, glossy. Wings of moderate length, nar- 

 row, pointed ; primaries tapering, the first longest, the rest rapidly 

 graduated, secondaries rounded. Tail very short, rounded. 



Bill and feet yellow, claws dusky. The head and upper part of the 

 neck are black, excepting a band of white elongated linear feathers, 

 beginning over the eye and extending down the hind part of the neck, 

 and a broad band of white commencing behind the ear and curving 

 forwards, to join the white which is the general colour of the lower 



