BIRDS OF NORTH AND MIDDLE AMERICA. T4838 
more grayish; ‘bill black, very compressed, with prominent gonyd- 
eal protuberance, bent tip, and feathered as far as above nostrils;”’ 
legs and feet yellowish brown in dried skins (probably vermilion 
red in life); exposed culmen, 42; commissure, 54; bill from anterior 
end of nasal fossa, 24; tarsus, 36.% 
Greenland; Iceland; Cumberland Gulf. 
Uria motzfeldi BentcxeEn, Isis, Aug., 1824, 889 (Greenland). 
Cepphus motzfeldi StEINEGER, Proc. U. 8. Nat. Mus., vi, Aug. 5, 1884, 210, 227, 
229 (crit.).—Bairp, BREWER, and Ripeway, Water Birds N. Am., ii, 1884, 
497.— AMERICAN ORNITHOLOGISTS’ Union, Check List, 1886, 349 (Hypo- 
thetical List, no. 2); 2d ed., 1895, 325 (Hypothetical List, no. 2); 3d ed., 1910, 
369. 
Clepphus] motzfeldi Ripaway, Man. N. Am. Birds, 1887, 17. 
Alca mansfeldi Srrsoum, Birds Japanese Emp., 1890, 276, in text (Greenland). 
Uria unicolor Faser, Isis, Sept., 1824, 981 (Iceland).—Breum, Isis, 1826, 988 
(Greenland); Handb. Vég. Deutschl., 1831, 985.—Scminz, Eur. Faun., i, 
1840, 360.—ScuuEGeEL, Rev. Crit., 1844, 106—BonararTe, Cat. Parzudaki, 
1856, 12. 
[ Uria] unicolor Bonaparte, Compt. Rend., xlii, 1856, 774. 
Grylle carbo (not Cepphus carbo Pallas, 1826) Bonaparte, Cat. Met. Ucc. Eur., 
1842, 82. 
Cepphus carbo Newton, Ibis, 1865, 518, part (Iceland). 
Alca gryile (not Colymbus grylle Linnzeus) ScHuEGEL, Mus. Pays-Bas, vi, no. 33 
(Urinatores), 1867, 20, part. 
Uria grylle Kumuren, Bull. U. 8. Nat. Mus., no. 15, 1879, 104, part (Cumberland 
Gulf). 
CEPPHUS CARBO Pallas. 
SPECTACLED GUILLEMOT. 
Adult in breeding plumage.—“ Bill long and stout, much more robust 
than in U.[i.e. C.] columba. General color deep slaty black, somewhat 
paler on the underparts and inclining to brown on the shoulders, under 
wing-coverts, and axillaries; orbital region white, extended pos. 
teriorly toward the ear-coverts; feathers above the nasal opening 
and on the chin and throat inclining to whitish. Tail composed of 
14 feathers. Total length about 14.5 inches [=368.3 mm.], culmen 
from feathers on forehead to tip 1.65 [=41.9 mm.], from gape to tip 
2.15-2.2 [54.6-55.9], greatest depth of both mandibles at base 0.5 
{12.7 mm.], wing 7-7.6 [177.8-179.3], tail 1.85-2.1 [47-53.3 mm.], 
@ Measurements reduced from inches and lines (Hamburg measure) to millimeters, 
by Dr. Stejneger. It is clear, from the measurements given, that this little-known 
bird can not be a phase of U. grylle, as so many have conjectured. The measurements 
are all much too large, and correspond closely with those of C. carbo. Someone hav- 
ing the opportunity should examine and carefully describe the type, if. it can be 
found, and the specimens (presumed to be the same species) in the Leyden and Brit- 
ish Museums; at the same time ascertaining whether they possess 12 or 14 rectrices, 
and thereby determining whether more nearly related to C. grylle or C. carbo. For 
a complete history of this bird see Stejneger, Proc. U. S. Nat. Mus., vii, 1884, 210-216. 
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