914 
U. S. P. R. R. EXP. AND SURVEYS — ZOOLOGY GENERAL REPORT. 
URIA RINGrVIA, Briinnich. 
Murre. 
Uria ringvia, Brunn. Orn. Bor. 1764, 28. 
Uria lachrymans, La Pylaie. 
Uria leucopthalmos, Faber, Isis, 1824, p. 146. 
Uria leucopsis, Brehm. 
? Uria alga, Brunn. Orn. Bor. 1764, 28. 
Uria troile, Bon. Syn. 1728, 424.— Aud. Orn. Biog. Ill, 1835, 142; pi. 218. 
Figures.— Gould, B. of Eur. IV, pi. 397.— Audubon, B. of Am. pi. 218.— Ib. oct. ed. VII, pi. 473.— Naumann, B. of 
Germ. pi. 332. 
Sp. Ch. — About the size of or rather larger than the preceding. Bill rather long, pointed, compressed; from the lateral 
feathers longer than the tarsus or than the inner toe and claw. Wings rather short ; tail very short. A narrow line of white 
encircling and running backwards behind the eye and over the ear. Head and entire upper parts dark brown, with a tinge of 
ashy. Under parts white; sides with transverse stripes of ashy brown; under wing coverts white; bill black; feet greenish 
black. Winter plumage, with the throat and all other under parts, white. The white line behind the eye frequently wanting, 
and different in length in specimens. 
Total length about 17 inches; wing, 7| to 8 inches; tail, 2 inches. 
Hab. — Northern America; Northern Europe and Asia. 
Easily distinguished by the line of white behind the eye, which is, however, not always 
present in specimens, as stated above. This is one of the most common birds of the higher 
northern latitudes on both sides of the continent. Specimens in the present collection are 
from California. 
List of specimens. 
Catal. 
No. 
Locality. 
When collected. 
Whence obtained. 
Collected by — 
3944 
9905 
Bodega, Cal 
February, 1855 
Lieut. Trowbridge 
Atlantic ocean 
S. F. Baird 
J. J. Audubon 
URIA ARRA, (Pallas.) 
Thick-billed Guillemot. 
Cepphus arra, Pallas, Zoog. Rosso-Asiat. II, 1811, 347. 
Uria brunnichii, Sabine, Trans. Linn. Soc. London, XII, p. 539.— Bon. Syn. 1828, 424.— Aud. Orn. Biog. Ill, 1835, 
336; pi. 345. 
Uriafrancsii, Leach, Trans. Linn. Soc. London, XII, p. 588. 
Uria troile, Brunnich, Orn. Bor. 1764, 103. (Not of Linnaeus.) 
Figures.— Audubon, B. of Am. pi. 345; oct. ed. VII, pi. 472.— Gould, B. of Eur. IV, pi. 398.— Naumann, B. of Germ 
pi. 333. 
Sp. Ch. — Much resembling the preceding in form and "colors, but with the bill shorter. About the size of U. ringvia. Bill 
moderate or rather short; curved at the tip, compressed; the distance from lateral feathers to tip less than the tarsus, but 
longer than inner toe and nail. Wing rather short; tail very short; tarsi strong. Head and entire upper parts brownish black; 
under parts white; tips of secondaries white; sides, under the wings, with transverse stripes of ashy brown; bill black; legs and 
feet greenish brown; no white stripe or circle about the eye. Winter and immature plumage, with the throat, (and other 
under parts,) white. 
Total length about 17 inches; wing, 7| inches; tail, 2 inches. 
Hob. — Northern America; Northern Europe and Asia; coast of New Jersey, (Mus. Acad. Philad.) 
