'J40-2 The Zoologist— December, 1870. 



Pacific coast : should the probability of its non-occurrence become a 

 certainty, the obvious inference would be additional evidence in favour 

 of the specific distinction of californica. 



Numerous examples of this species are in the Smithsonian Museum ; 

 among them Dr. Bryant's t^'pes. The bird breeds much further south 

 than its Atlantic representative, occurring in summer on the coast of 

 California. 



Lomvia svarbag (Briinn.), Coues. — Habitat: coast of the North 

 Atlantic and Pacific, and of the Arctic Seas. Herald Island (Mus. 

 Smiths.) In winter on the American coast south to New Hampshire 

 (Author's cabinet) and New Jersey (Mus. Acad. Philadelphia). Breeds 

 in the^Gulf of St. Lawrence (Bryant). 



Form subtypical of the genus. Bill short, hardly exceeding the 

 tarsus in length of culmen, very stout, wide and deep at the base; 

 culmen curved in its whole length ; rictus straight for about half its 

 length, then much deflexed ; gonys long, its outline decidedly concave ; 

 mandibular rami short, eminentia symphysis very prominent; tomial 

 edges of the upper mandible in their basal half turgid, and entirely 

 bare of feathers. Slightly larger, and rather more robustly organized, 

 than L. troile. In other respects of form identical with L. troile ; the 

 plumage and its changes also the same. The turgid portion of the 

 tomia of the upper mandible flesh-coloured in life, becoming yellowish 

 in the dried slate. Length 1800; extent 3-200 ; wingS'oO; tail 2-25; 

 tarsus r25; middle toe and claw 2'10; outer toe and claw TOO; inner 

 toe and claw TGO; bill along culmen r40, along rictus 2*20, along 

 gonys "DO, depth at eminentia symphysis '55, width at base of nostrils 

 '30, at angula oris '80. The peculiar shape of the bill strongly charac- 

 terizes this species. It is a ralher more robust bird than L. troile, and 

 upon an average a little larger. The colours of the plumage are not 

 very appreciably different; perhaps slightly darker, and tending a little 

 more decidedly towards a slaty or plumbeous hue, particularly in 

 winter. Tlie seasonal changes are precisely the same. The only 

 decided difference in colour lies in the whitish or yellowish hue of the 

 expanded tomia of the upper mandible. 



Briinuich's guillemot appears to be the most boreal species of the 

 genus, frequenting the Arctic Seas, as well as more temperate latitudes. 

 At the same time it has been found further south in winter, on the 

 Atlantic coast of North America, than the other species ; and is of 

 frequent occurrence on the United States coast at that season. It is 

 also of constant occurrence in the North Pacific. 



