56 Proceedings of the Royal Physical Society. 
Until put right by Sir Wm. Jardine, I confounded the single 
specimen received of this species with the Oidemia fusca.ov vel- 
vet scoter of Britain and Europe, to which it is very closely 
allied — the specific differences consisting in the proportions 
of the bill, the form of the tuberosity on it, and in the white 
spot under the eye being larger, and extending in a narrow 
circle partially round the eyelids. Sir William suggests that 
both the American and European bird may range in each con- 
tinent, and that we may find the American form here, or if 
not, that it is just one of those very close forms which requires 
farther examination to enable us to say whether it is an ex- 
tent of variation only, or really a distinct species. 
Oidemia Americana (Linn.) ; Trout Lake. 
Mergus serrator (Linn.); Trout Lake, Severn House. 
Mergus cucullatus (Linn.) ; Hudson's Bay, Trout Lake. 
Pelecanus erythrorhynchus (Gmel.) ; Hudson's Bay. 
Larus zonorhynchus (Rich, and Sw.) (?) ; Hudson's Bay. 
Sir Wm. Jardine remarks that in any specimens or 
figures of the L. zonorhynchus which he has seen, the black 
mark on the bill is at some distance from the tip, which is 
not the case in this specimen. It does not agree with any 
other, therefore, most probably, is a variety of this species. 
Larus argentatus (Gmel.) ; Severn House. 
Lestris cephus, Brunnich 1764 (Buffonii, Yarr.) ; Moose 
Factory. 
Xema Bonapartii (Bich. and Sw.) ; Severn House. 
Fortunately several specimens of this gull have been re- 
ceived. It is rare in collections, but would appear not to be 
so in Hudson's Bay. 
Sterna Hirundo (Lmn.), (Common Tern.) ; Hudson's Bay. 
Sterna arctica (Temm.) ; Moose Factory and Trout Lake. 
Sterna nigra (Linn.) ; Moose Factory, and Severn House. 
Uria grylle (Lath.), (Black Guillemot.) ; Severn House. 
Podiceps cornutus (Linn.) (Horned Grebe) ; Trout Lake. 
The band on the head and cheeks is much paler in the 
specimen received than in European specimens. 
Colymhus arcticus (Linn.), (Black- throated Diver); Severn House. 
Colymbus glacialis (Linn.), (Great Northern Diver); Severn House. 
