THE ZooLoGist—SEPTEMBER, 1875, 4603 
*Iceland or Lesser Whitewinged Gull (Larus leucopterus). 
“ Nayangoak.”—Breeds in both Inspectorates, but more commonly 
in the Southern. Also observed on the East Coast, and said to 
breed on the Parry Islands. In Greenland it is reported to be the 
most common gull after the kittiwake. Its comparatively small 
size, pale blue mantle (which, however, is subject to some variations 
of shade), and white primaries distinguish this species from any 
other. Immature birds vary greatly in the intensity of the brown 
clouding of the plumage. 
*Glaucous Gull or Burgomaster (Larus glaucus). ‘‘ Naya,” 
“ Nayavek,” “ Nayainak.”—The most common large gull in Green- 
land. At Najartut, south of Godthaab, said to breed by itself, but 
inost generally in company with Rissa tridactyla and L. leucopterus. 
Subject to the same variation of shade as the latter, but the existence 
of species called L. arcticus and L. glacialis has not been confirmed. 
Found also on the west side of Davis’ Strait and the East Coast of 
Greenland, and said to be as numerous in the Polar Sea as it is in 
Davis’ Strait. 
tGreat Blackbacked Gull (Larus marinus).  “ Nayardluk,” 
“ Nayardlurksoak.”—Breeds generally throughout Danish Green- 
land, but most commonly between lat. 63° and lat. 68°. As large 
as the preceding species, or larger, but easily distinguished there- 
from by its black back and primaries. 
Great Skua (Stercorarius catarrhactes).—Seen twice on the 
south coast by Holbdll. 
*Pomatorhine Skua (Stercorarius pomatorhinus).—Said to be 
the commonest species of skua in the north. Breeds in societies 
from Bjornenes, north of Egedesminde, to the northward. Several 
were killed in Regent Inlet, and it was also seen on the Parry 
Islands, but more rarely than the next species. Authenticated 
eggs of this bird are rare in collections. It is easily distinguished 
in flight by the peculiar formation of the two middle tail-feathers, 
which are twisted near the tip, so as to take a vertical direction, and 
give the appearance of a disc or ball attached to the bird’s tail. 
* Common Skua (Stercorarius parasiticus). ‘ Isingak,” “ Meriar- 
- sairsok.”—Breeds in both Inspectorates, but most commonly in the 
Southern, Found on the East Coast by Graah, but not by the 
German Expedition. Obtained also on the west coast of Davis’ 
Strait. Equally abundant in the Polar Sea as in the latter. To be 
distinguished from the preceding. species by its smaller size and 
