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).4 
Coasts and islands of Bering Sea and contiguous portions of Arctic 
and northern Pacific oceans; breeding from Koliutschin Island, Arctic 
coast of eastern Siberia (near Bering Strait) and Cape Lisburne, 
Alaska, southward to Aleutian and Commander islands and Glacier 
Bay; in winter southward to Kuril [slands and Queen Charlotte 
Islands, rarely as far as Monterey Bay, California (1 specimen, Feb. 17, 
1914). 
Alea arctica] 8 Guetin, Syst. Nat., i, pt. ii, 1/89, 549 (Bird Island, between Asia 
and America).—Latuam, Index Orn., ii, 1790, 792. 
Mormon corniculata Naumann, Isis, 1821, 782, pl. 7, figs. 3, 4 (Kamchatka.)— 
Kirriirz, Denkw. Reise, i, 1858, 301 (St. Matthew Island, Bering Sea).— 
Cassin, in Baird, Rep. Pacific R. R. Surv., ix, 1858, 902; Proc. Ac. Nat. Sci. 
Phils., 1862, 324 (Bering Strait).—Barrp, Cat. N. Am. Birds, 1859, no. 
713.—Datt and Bannister, Trans. Chicago Acad. Sci., i, 1869, 308 (St. 
Michael, Coal Harbor, and Unga Island, Alaska; Plover Bay, Siberia). 
—Datt, Proc. Celif. Ac. Sci., v, 1873, 34 (Unalaska, breeding); v, 1874, 279 
(Aleutian Islands). : 
M[ormon] corniculata SaunpvERS, Ibis, 1883, 348. 
Mormon corniculatum Krrriitz, Kupfertaf., i, 1832, 3, pl. 1, fig. 1—MmpEnporrr, 
Sibir. Reise, ii, pt. 2, 1853, 240.—Swinnog, 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.—Buaxiston and Prysr, Trans. Asiat. Soc. Japan, viii, 
1880, 179; x, 1882, 89.—Buaxiston, Amend. List Birds Japan, 1884, 29, 31. 
Mormon corniculatus Patmin, Swed. Cat. Lond. Fish. Exhib., 1883, 201.—Srx- 
BoM, Ibis, 1881, 174 (Kuril Islands). 
Lunda corniculata Pattas, Zoogr. Rosso-Asiat., ii, 1826, 365, part.—ScHLEcEL, 
Mus. Pays-Bas, vi, no. 33 (Urinatores), 1867, 28.—Branprt, Mélang. Biol., 
vii, 1869, 242. 
Fratercula corniculata Gray, List Birds Brit. Mus., iii, Anseres, 1844, 153; Gen. 
Birds, iii, 1848, pl. 174.—Rzicuenspacn, Natatores, 1850, pl. 5, fig. 28.— 
Kirriitz, Journ. fiir Orn., 1858, 389; Denkw. Reise, ii, 1858, 224.—DreLanp 
and Gere, Orn. Eur., ii, 1867, 609, part—Covzs, Proc. Ac. Nat. Sci. 
@ Twelve specimens. 
Great- i 
Locality. Wings.| Tail. | our | g@st,, | Tarsus,| Middle 
of bill 
MALES, 
Five adult males from Alaska...........-..22-eeeeeeee 183.4 64.1 49.8 42.9 28.3 41.8 
Two adult males from Bering Island, Kamchatka..... 176.5 64 52.5 45.2 27 40 
FEMALES. 
Ten adult fomales from Alaska..............00200ese0e 177.5 63.9 49.3 43.1 28.4 41.4 
One adult female from Bering Island...........:...--. 176 61 51 43.5 29 41.5 
One adult female from eastern Siberia (Emma Harbor).| 184 62 52.5 46 29 42.5 
