PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 67 
present at least, only as a lonely straggler from Kamtschatka, usually 
a young bird, and there is no reason why this should have been difter- 
ent during Steller’s time. I have seen such a young bird here, shot on 
the island, obtained by Mr. Grebnitzky, and forwarded by him to the 
Academy in St. Petersburg. It was in the same plumage as the young 
specimen in the National Museum. The measurements are as follows: 
Total length 910™™; chord of culmen from forehead to tip.85™™, from 
cere to tip 68™"; radius of curvature of culmen from cere to tip 41; 
bill from tip to mouth 84, to hind angle of nostrils 62, and from this 
point to fore angle of eye 40™; height of upper mandible at upper bor- 
der of cere 37, and its breadth at the lower border of cere 27™™; gonys, 
29; wing, 630; tail feathers, 340™™; from feathering on front of tarsus 
to base of middle claw 142; chord of the latter 34, and of its hind claw 
44mm, 
It will be seen from the above statement that the bald eagle is an in- 
habitant of the island, but I can affirm that it is very scarce at present 
in proportion to what it must have been only a few years ago, judging 
from the many abandoned nests and from reports of the residents. 
But it seems as if a third species of sea eagles should be added, not 
only to the fauna here, but even to the list of known birds, for I have 
never seen a young Halicwetus with the whole lower surface almost white, 
and the upper side with dark tips and edgings on a whitish bottom, such 
as my No. 1055. This, a young @, still with black tail, was shot on the 
15th of May, measuring in total length 890™™ (35 inches), with a stretch 
of wings of 2.220™ (87.40 inches); iris, faint yellowish white; bill, horny 
brown; cere, yellow with horny brown shadings on the back; feet, 
bright golden yellow. 
Compared with the young of H. leucocephalus of the same age, it has, 
quite in contrast with the white color of the body, the tail feathers, 
under tail-coverts, and axillaries still darker colored. The size is not 
inconsiderably less than that of the bald eagle, as the specimen in ques- 
tion represents the largest size of its kind, being not larger than an old 
male of the said species. The billis fully equal in size to that of a young 
leucocephalus, and the feet likewise; but the body, tail, and wings are 
smaller. 
I have little doubt that this bird if more mature would have assumed 
an almost uniform white plumage below, with white tail, a supposition 
corroborated by the statement of Mr. Grebnitzky, that he himself onee 
has observed here, on the island, an eagle with a white lower surface 
and tail. 
That we do not deal in our case with an albino is evident not only 
from the color of the eyes, but the character of the whole plumage would 
also contradict such a theory. The white color does not appear as an 
irregularity, and the dark colors are deep and distinct. 
Upon the whole, I reach the conclusion that the present bird is suffi- 
ciently distinct from H. leucocephalus, and, consequently, also from H. 
