722 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



A(Mt male.— Wing, 191-204.5 (197); tail, 44-52 (46.8); exposed 

 culmen, 40-49.5 (46.8); depth of bill at gonydeal angle, 13-15 (13.6); 

 tarsus, 34-39 (36.6); middle toe, 41-46 (43.9).« 



Adult female.— Wing, 185-208 (190.7); tail, 41-50.5 (46.7) ; exposed 

 culmen, 40-50 (43.5);^ depth of bill at gonydeal angle, 12.7;'= 

 tarsus, 33.5-39.7 (35. 6); middle toe, 40-48 (43.7).^ 



Coasts and islands of northern Atlantic Ocean and eastward to 

 Spitzbergen; breeding from southern Greenland southward to New- 

 foundland, Magdalen Islands, and Bay of Fimdy, on European side 

 as far as coast of Portugal (Berlanga Island); in winter southward 

 to coast of Maine, coast of Spain, and, rarely, adjacent portion of 

 Mediterranean Sea. 



[Colymbits] troille Linn^us, Fauna Suecica, ed. 2, 1761, 52 (Spitzbergen). 



Uria troille Nuttall, Man. Orn. U. S. and Can., Water Birds, 1834, 526. 



Vria troille troille American Ornithologists' Union, Check List, 3rd ed., 1910, 

 p. 31. 



Catarractes troille Bryant, Proc. Bost. Soc. N. H., viii, 1861, 137 (monogr.). 



[Colymbus] troile Linnaeus, Syst. Nat., ed. 12, i, 1766, 220. — Gmelin, Syst. Nat., 

 i, pt. ii, 1789, 585. 



Colymbus troile Boddaert, Tabl. PI. Enl., 1783, 54 (PI. Enl., pi. 903).— O'Reilly, 

 Greenland, 1818, 144. 



[Uria] troile Latham, Index Orn., ii, 1790, 796. — Reinhardt (J.), Journ. fiir 

 Orn., 1854, 442 (Greenland).— Gray, Hand-list, iii, 1871, 101, tio. 10820.— 

 Sharps, Hand-list, i, 1899, 130. 



Uria troile Bonnaterre, Tabl. Enc. M^th., i, 1790, 35, pi. 9, fig. 3. — Temminck, 

 Cat. Syst., 1807, 182; Man. d'Orn., 1815, 606; 2d ed., pt. ii, 1820, 921; iv, 1840, 

 573.— ViEiLLOT, Nouv. Diet. d'Hist. Nat., xiv, 1817, 35, part, pi. E7, 

 fig. 3.— Meyer and Wolf, Taschenb. Deutschl., 1810, 445.— Boie, Isis, 1822, 

 872. — Valenciennes, in Choris Voy. Pittor. antour du Monde, 1822, Aleout., 

 25, pi. 20.— Stephens, Shaw's Gen. Zool., xii, pt. 2, 1824, 244.— Werner, 

 Atlas, Palmiijfedes, 1828, pi. 95. — Swainson and Richardson, Fauna Bor.- 

 Am., ii, 1831, 477.— Brehm, Handb. Vog. Deutschl., 1831, 981.— Gould, 



o Nine specimens. ^ Sixteen specimens. c Two specimens. 



Locality. 



MALES. 



Three adult male'^ from Europe 



Six adult males from Atlantic coast of North .\merica. 

 Ten adult males from Pacific coast of North .\merica 



( U. t. cnlifiirnica) 



Five adult males of U. riiu/via 



FEMALES. 



Six adult females from Europe 



Ten adult females from Atlantic coast of North America 

 Eleven adult females from Pacific coast of North Amer- 

 ica ( U. t. californica) 



One adult female of U. ringvia 



Wing. Tail 



195. 8 

 197.6 



20S. 9 

 201.7 



196.2 

 198. S 



204 

 202 



•J5 

 •17.7 



4,-,. 9 

 40.1 



4fi. 6 



46.8 



45.6 

 47 



Cul- 

 men. 



47.5 

 43.4 



46.1 

 43.2 



46.6 

 41. 9 



45.7 



Great- 

 est 

 depth 

 of bill. 



13 

 13. 3 



14.1 



12.7 

 13.2 



Tarsus. 



36.3 

 36.8 



3(). 3 

 37.7 



,35.2 

 36.1 



36.3 

 35 



Middle 

 toe. 



44.1 

 43.9 



45.9 

 45.6 



42.2 

 44.6 



