744 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



tarsus 1.4-1.5 [35.6-38.1 mm.], middle toe and claw 1.9-2.1 [48.3- 

 53.3 mm.]." « 



"Adult in nonhreeding j)luinage. — Chin, throat, foreneck, and 

 under parts white, inner web of flank feathers gray. 



"Immature (February). — Resembles the adult in winter plumage, 

 but the foreneck is grayish and the feathers of the sides, flanks, and 

 belly are mostly fringed at the extremity with dark brown. 



"Quite young hird (August). — Has the upper parts as in the adult, 

 the white ring around the eye nearly obsolete, the foreneck, chest, 

 sides, and flanks dark smoky-black, and the rest of the under parts 

 white, widely fringed with brownish-black." 



Coasts and islands of northeastern Siberia (Olga Bay; Usuri; Abrek 

 Bay; Cape Shipunski; coast of Taiganose Peninsula, south of Chaibook 

 Point, breeding), Kamchatka (Bering Island, April 28, 1883, four speci- 

 mens), and northern Japan (Sakhalin Island; Bay of Sendai, eastern 

 coast of Hondo; Yezo; Hakodate; Uraga, near Yokohama; Kuril 

 Islands?); Sea of Okotsk ? ; Unalaska Island, Alaska??? 



Cepphus carbo Pallas, Zoogr. Rosso-Asiat., ii, 1826, 350, pi. 79 ("especially 

 abundant in the caves around Unalaska, wherefrom I have received numer- 

 ous specimens").^ — Reichenbach, Natatores, 1850, pi. Ill, figs. 2937-2939. — 

 Newton, Ibis, 1865, 519 (crit.). — Stejneger, Proc. U. S. Nat. Mus., vLi, 

 1884, 225, 226, 227, 229 (geographic range; synonymy); x, 1887, 118 (Bering 

 Island; Bull. U. S. Nat. Mus., no. 29, 1885, 22 (Bering Island; 4 specs., 

 April 28, 1883). — Baird, Brewer, and Ridgway, Water Birds N. Am., 

 ii, 1884, 496. — -American Ornithologists' Union, Check List, 1886, 350 

 . (hypothetical list, no. 3); 2d ed., 1895, 326. — Giglioli and Salvadori, Proc. 

 Zool. Soc. Lond., 1887, 593 (Olga Bay, e. Siberia; crit.). — Taczanowski, 

 M^m. Ac. St. Petersb., xxxix, 1893, 1224 (e. Siberia).— Allen, Bull. Am. 

 Mus. N. H., xxi, 1905, 224 (coast Taiganose Peninsula, south of Chaibook 

 Point, n. e. Siberia, breeding). — Clark (A. H.), Proc. U. S. Nat. Mus., 

 xxxviii, 1910, 33 (Sakhalin Island, Japan).— Brooks (W. S.), Bull. Mus. 

 Comp. Zool., lix, 1915, 370 (Cape Shipunski, Siberia, May 21, 1913). 



C[epphus] carbo Ridgway, Man. N. Am. Birds, 1887, 17. 



Una carbo Brandt, Bull. Ac. Sci. St. Petersb., ii, 1837, 346; Melang. Biol., vii, 

 1869, 206. — Gould, Birds Asia, vii, 1851, pi. 71 and text. — Middendorff, 

 Sibir. Reise, ii, pt. 2, 1853, 239, pi. 23, fig. 6. — Cassin, in Baird, Rep. Pacific 

 R. R. Surv., ix, 1858, 913; ed. 1860 ("Birds N. Am."), atlas, pi. 97; Proc. 

 Ac. Nat. Sci. Phila., 1862, 323 (Bay of Sendai, e. coast Hondo, Japan).— 

 Schrenck, Reis. Amur-land, i, 1860, 496, pi. 16, fig. 1 (egg). — Baird, Cat. 

 N. Am. Birds, 1859, no. 728.— Coues, Proc. Ac. Nat. Sci. Pliila., 1868, 73, 

 fig. 15 (monogr.); Check List, 1873, no. 633; 2d ed., 1882, no. 873.— Homeyer, 

 Journ. fur Orn., 1870, 435 (Okotsk Sea).— Swinhoe, Ibis, 1875, 458 (Hako- 

 date, Japan). — Taczanowski, Journ. fiir Orn., 1876, 203 (Usuri, e. Siberia); 

 Orn. Faun. Vest. Sibir., 1877, 73; Bull. Soc. Zool. France, 1877, 51 (Abrek 



o- Not having seen a specimen of this species (except a head, only, in the U. S 

 National Museum collection), I quote the above descriptions from Grant, Cat. Bird.s 

 Brit. Mus., xxvi, 1898, 598. 



b Translation. See Stejneger, Proc. U. S. Nat. Mus., vii, 1884, 226, where probal);e 

 error in statement of locality is explained. 



