Barrows.] 160 [April 4, 



18. Lomvia troile. 



Colymbus troille Linnaeus, 1761. Uria troile Latham, Temminck, 

 Gould, Gray, Naumann. Lomvia troile Brandt, Coues. Cepphus 

 lomvia Pallas. 



Bill longer than tarsus, its depth at nostrils much less than half 

 the culmen. Tomia of mandibles somewhat inflected near the angle 

 of mouth, but mostly feathered. Color in summer dark glossy 

 olive-brown all around the head and neck, shading into duller and 

 blackish colors on the back, wings and tail. Entire under parts, from 

 the upper part of breast, pure white, sometimes streaked on the sides 

 and flanks with brown or black. Some specimens have a ring round 

 the eye, and a line behind it, white (this is variety ringvia). In 

 winter, and in young birds, the white of the under parts extends to 

 the bill, and sometimes even up the sides of the face beyond the eye, 

 leaving, however, a dark line behind the eye. Length 16-18 in. 

 Wing 8 in. Tail 2 in. Seven specimens. 



Coll. La Fresnaye, No. 8136, Society's Coll., No. 9210; N. Europe; 

 mounted. 



Coll. La Fresnaye, No. 8137, Society's Coll., No. 9211 ; N. Amer- 

 ica; mounted. 



Coll. La Fresnaye, No. 8138, Society's Coll., No. 9212; Arctic 

 Sea; mounted. 



Coll. La Fresnaye, No. 8139, Society's Coll., No. 9213; N. Europe; 

 young; monnted. 



Coll. La Fresnaye, No. 8140, Society's Coll., No. 9214; North 

 Sea ; young ; mounted. 



No. 54770; skin; moulting; Kodiak. 



No. , Mass. Dr. Wm. Ingalls. 



19. Lomvia arra. 



'Cepphus arra Pallas, 1811. Uria Svarbag Briinnich. Uria Briin- 

 ■nichii Sabine, Temm., Bonap., Nutt., Gould, Aud., Gray. 



Very similar to L. troile, but the general form stouter and more thick 

 set. The bill is very much shorter ; length of culmen only about 

 twice the depth of bill at nostrils. The culmen is more abruptly 

 convex in this species than in L. troile, and the nasal fossa is broader 

 and extends further in front of the feathers, though the nostrils are 

 still completely covered. The tomia of upper mandible back of the 

 nostrils is bare of feathers and considerably dilated, a very noticeable 

 feature, especially in life, when it is said to be white, the rest of the 

 bill being dark. The distribution .of colors is almost precisely like 





