790 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Adult female.— Wing, 168-185 (177.9); tail, 61-68 (63.5); culmen, 

 47-52.5 (49.7); greatest depth of bill, 37.5-46 (43.4); tarsus, 25-31 

 (28.5) ; middle toe, 38.5-44 (41.5) .« 



Coasts and islands of Bering Sea and contiguous portions of Arctic 

 and northern Pacific oceans; breeding from Koliutschui Island, Arctic 

 coast of eastern Siberia (near Bering Strait) and Cape Lisbume, 

 Alaska, southward to Aleutian and Commander islands and Glacier 

 Bay; in winter southward to Kuril Islands and Queen Charlotte 

 Islands, rarely as far as Monterey Bay, California (1 specimen, Feb. 17, 

 1914). 



Alca arctica] 8 Gmelin. Syst. Nat., i, pt. ii. 1/89. 549 (Bird Island, between Asia 



and America'). — Latham, Index Orn., ii, 1790, 792. 

 Mormon corniculata Naumann, Isis, 1821, 782, pi. 7, figs. 3, 4 (Kamchatka.) — 



KiTTLiTZ, Denkw. Reise, i, 1858, 301 (St. Matthew Island, Bering Sea). — 



Cassin, in Baird, Rep. Pacific R. R. Siirv., ix, 1858, 902; Proc. Ac. Nat. Sci. 



Phili., 1862, 324 (Bering Strait).— Baird, Cat. N. Am. Birds, 1859, no. 



713.— Dall and Bannister, Trans. Chicago Acad. Sci., i, 1869, 308 (St. 



Michael, Coal Harbor, and Unga Island, Alaska; Plover Bay, Siberia). 



—Dall, Proc. C?lif. Ac. Sci., v, 1873, 34 (Unalaska, breeding); v, 1874, 279 



(Aleutian Islands). 

 M[ormon] corniculata Saunders, Ibis, 1883, 348. 

 Mormon corniculatum Kittlitz, Kupfertaf ., i, 1832, 3, pi. 1, fig. 1. — Middendorff, 



Sibir. Reise, ii, pt. 2, 1853, 240.— Swinhoe, Proc. Zool. Soc. Lond., 1863, 



331 (s. coast Okotsk Sea). — Homeyer, Journ.fiir Orn., 1870, 436 (e. Siberia). — 



Taczanowski, Bull. Soc. Zool. France, ii, 1877, 52 (Okotsk Sea); Orn. Faun. 



Vost. Sibir., 1877, 74. — Blakiston and Pryer, Trans. Asiat. Soc. Japan, viii, 



1880, 179; X, 1882, 89.— Blakiston, Amend. List Birds Japan, 1884, 29, 31. 

 Mormon corniculatus Palmen, Swed. Cat. Loud. Fish. Exhib., 1883, 201. — See- 



BOHM, Ibis, 1881, 174 (Kuril Islands). 

 Lunda corniculata Pallas, Zoogr. Rosso- Asiat., ii, 1826, 365, part.— Schlegel, 



Mus. Pays-Bas, vi, no. 33 (Uriuatores), 1867, 28. — Brandt, Melang. Biol., 



vii, 1869, 242. 

 Fratercula corniculata Gray, List Birds Brit. Mus., iii, Anseres, 1844, 153; Gen. 



Birds, iii, 1848, pi. 174.— Reichenbach, Natatores, 1850, pi. 5, fig. 28.— 



Kittlitz, Journ. fiir Orn., 1858, 389; Denkw. Reise, ii, 1858, 224. — Degland 



and Gerbe, Orn. Eur., ii, 1867, 609, part. — Coues, Proc. Ac. Nat. Sci. 



o Twelve specimens. 



Locality. 



Wings. 



MALES. 



Five adult males from Alaska 



Two adult males from Boring Island, Kamchatka 



FEMALES. 



Ten adi:lt females from Alaska 



One adult female from Bering Island 



One adult female from eastern Siberia (Emma Harbor) 



Tail. 



183.4 

 176.5 



64.1 

 64 



177.5 63.9 

 176 ' 61 

 184 62 



Middle 

 toe. 



41.8 

 40 



41.4 

 41.5 

 42.5 



