206 THE ZOOLOGIST. 
only one contained any food; this consisted of two caterpillars, 
(Dasychira grenlandica, Wocke), one bee, and pieces of an Alga 
(Gleocapsa magna, Klr.). Dr. Coppinger saw Knots frequently 
in Polaris Bay during July, 1876; he met with one brood of five 
young together among stones. 
Arctic Trrn, Sterna hirundo, L.—In the end of June, 1875, 
many of these birds were seen seated on floating pack ice drifting 
out of Baffin’s Bay. ‘Terns were observed in the first week of 
August in Hayes Sound. The first Arctic Terns were met with 
in Discovery Bay in 1876, on the 23rd June; afterwards they 
became frequent, breeding along the shore on the bare shingle in 
several places; one nest with four eggs was found in Discovery 
Bay. On several occasions I watched these birds fishing for 
small fry of the Charr (Salmo alipes, Rich., S. Naresii, Giint.) in 
the large lake inland of Musk-ox Bay, lat. 81° 46’; but their 
chief food was upon green caterpillars, Argynnis chariclea and 
Tipula arctica; stomachs examined sometimes contained over a 
dozen caterpillars. Dr. Coppinger stated that Terns arrived in 
Polaris Bay in flocks of twenty or thirty in July; not, as a rule, 
breeding there. He found one nest, however, and described 
the parents as being unusually fierce in their endeavours to 
protect it. 
Ivory Gui, Pagophila eburnea.—On the 19th August I saw 
birds of this species north of Cape Frazer, in lat. 79° 42’; they 
were probably breeding somewhere in the neighbourhood; they 
kept flying and screaming about the cliffs, and I watched them 
for some time, but the locality was inaccessible, and no search 
could be made for a nest. On the 30th July, 1876, I saw an 
Ivory Gull in Discovery Bay; after that date they became 
frequent, and were incessantly harassed by the Long-tailed Skua. 
These birds came northward after the breeding-season was over, 
there not being water in Discovery Bay to support them in the 
earlier months, when the other migrants made their appearance. 
All seemed adult birds, none of the spotted young having been 
observed. In Polaris Bay Dr. Coppinger observed a couple of 
pairs late in the season, but obtained no evidence that they bred 
there. 
GREATER BuLack-BACKED GuLL, Larus marinus. — I saw 
several of these birds at the end of June, 1875, upon floating ice 
in Baffin’s Bay. 
——e ee 
Ae 
