Not figured.
Bill much compressed, its ridge convex in its whole length, but with
its basal outline, although semicircular, only half an inch in extent,
so that between its margins and those of the sides of the bill, there
is behind the nostrils a space nearly a quarter of an inch in breadth;
the ridge in its whole length, the tip of the upper mandible, and the
crura of the lower along their inferior edge, yellow, the rest black;
feet yellow; head and neck ash-grey; the fore part of the back shaded
into blackish-grey; wings entirely brownish-black, shafts of primaries
white, toward the end brownish-black; hind part of back, rump, and
upper tail-coverts white; tail deep grey, the bases and shafts of the
feathers white, loral space of a darker grey than the rest of the
head, that colour deepening at the fore part of the eye, forming a
spot which includes the whole of the upper eyelid, and the anterior
half the lower, of which the other half is white; lower half of the
neck anteriorly, breast, sides, abdomen, lower tail-coverts, some of
the axillaries, and the larger wing-coverts white; the others being
brownish-black.
Length, 37; wing, 21; bill, 5-1/4; tail, 8-1/4.
Pacific Ocean, not far from Columbia River.
Diomedea chlororhynchos, Aud. Orn. Biog. v. v. p. 326.