Capt. Sastne’s Memoir on the Birds of Greenland, $c. 545 
inches and a half. Extent sixty-three inches. Weight 4lb. 8 oz. 
Length of the tarsus two inches seven-eighths: the females ave- 
raged rather less. Temminck (Manuel, p. 490, note) appears to 
have seen an immature specimen of this bird, to which he was 
disposed to give the name of L. giganteus : this name would not 
be a correct one, because it is a smaller bird than the L. marinus. 
Temminck identifies his specimen with the L. Ictyætos of Pallas, 
but that bird is a black-headed Gull. | 
The Larus glaucus is unquestionably the Burgomaster Gull of 
the Dutch, and preys on smaller birds as well as on fish. One spe- 
cimen which was killed disgorged a little Auk when it was struck, 
and proved on dissection to have a second in its stomach. 
lam indebted to Mr. James Ross, a midshipman of the Isa- 
bella, (one of the Discovery ships,) for a singular specimen of a 
Gull which, though differing in several points, I conceive must be 
placed under this species: it was shot on the 6th of June near 
the middle of Davis’s Straits. Its description is as follows: 
Length twenty-six inches; extent fifty-eight inches; a male 
bird ; plumage wholly white, the feathers of the hind head, neck, 
back and wings being occasionally tinged with a very faint brown- 
ish hue; the legs and feet flesh-coloured; length of the tarsus 
two inches and a half; irides deep brown; the length of the bill 
from the corner of the mouth two inches and a half, being full 
half án inch shorter than in the usual specimens of the Larus- 
glaucus ; the bill is a yellowish horn-colour, the ends of both 
mandibles being a lead-colour. From the colour of the bill and 
the faint spots on the feathers, this bird was evidently immature ; 
and it may reasonably be presumed that its full plumage would 
have been entirely white. In this, and in its smaller size, it differs 
strongly from the Glaucous Gull; both of these circumstances, I 
conjecture, 
