THE ZooLocist—SEPTEMBER, 1875. 4601 
Holbéll doubts its doing so, Prof. Reinhardt thinks that this species 
may breed in Greenland. 
* Arctic Tern (Sterna hirundo). “ Imerkoteilak”’ — Breeds in 
various suitable localities on both coasts of Greenland, as well as on 
the western shores of Baffin’s Bay. 
* Sabine’s Gull (Xema Sabinii).—Said not to breed further south 
than lat. 75° N. and appears not to be common in Danish Green- 
land, but was found by Sir E. Sabine breeding in great numbers on 
three small islands in lat. 75° 30’ [qu. Sabine Islands in Melville 
Bay ?] associated with the arctic tern. Many specimens were ob- 
tained in June and July at Winter Island and Aulitiwick, where 
subsequently flocks were seen flying high, as if migrating to the 
southward. Has been found breeding in North-Western America, 
but nothing has yet been recorded of its habits in that quarter. 
Sir E. Sabine informed Richardson that he killed two in Spits- 
bergen, and the latter says that the specimen brought thence was 
in full summer plumage, but it has not since been observed by 
others in that country. Dr. von Middendorff found it breeding 
abundantly at the mouth of the Taimyr, again in company with the 
arctic tern. The fact of these two species resorting to the same spot 
in localities so far apart should put observers on their guard against 
the possibility of confounding the nests and eggs of each. The 
eggs of this gull are extremely rare in collections, and such as have 
been seen do not so much differ from those of the tern (which are 
common enough) as to obviate the need of the most careful identi- 
fication. This gull is of small size, and may be distinguished from 
others by its gray head, black collar and forked tail. From the 
arctic tern it may be known by its stouter build, less pointed wings 
and tail, and black bill and feet, the former having a yellow tip— 
the tern having the bill and feet red, while in it the dark colour 
of the head is confined to a cap and does not extend below the 
eyes. 
* Cuneatelailed or Ross’s Gull (Rhodostethia rosea).—One of the 
rarest of birds, to be distinguished from other gulls by its small 
(almost dove-like) black bill, white head and neck, with a black ring 
round the latter, and wedge-shaped tail—the plumage, especially of 
the lower parts, deeply tinged with rose-colour. Four specimens 
have been received from Greenland by the Museum of Copenhagen, 
of which three were shot in Disco Bay, and the fourth near the 
Sukkertop, while a fifth is believed to have been obtained by 
