263 



BLACK-THROATED GUILLEMOT. 



-j Uria antiqua, Gmel. 



PLATE CCCCLXX.— Adult and Young. 



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 London, by permis- 

 sion of the Council. 



Alca ANTiauA, Gmel. Syst. Nat, vol. i. p. 551. 



Black-throated Guillemot, Uria antigua, And. Orn. Biog., vol. v. p. 100. 



Adult, 10l, wings, 5 T V 



North-west coast of America. Abundant. 



Adult. 



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 obtuse; 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 inner 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, narrow, 

 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 



