not occur so frequently in that plumage
as it does on the south coast of Devon and Dorset; indeed I have never
found either this bird or the Great Northern Diver so common in the
Channel Islands as they are about Exmouth and Teignmouth, even in the
ordinary winter plumage; probably the mouths of rivers were more
attractive to them as producing more food than the wild open seas of the
Channel Islands. Owing to its various changes of plumage, from age or
time of year, the Red-throated Diver has been made to do duty as more
than one species, and is the Speckled Diver of Pennant, Montagu and
Bewick.

It is mentioned in Professor Ansted's list, but marked as only occurring
in Guernsey. There is no specimen at present in the Museum.

156. GUILLEMOT. _Alca troile_, Linnaeus. French, "Guillemot a capuchon,"
"Guillemot troile."--The Guillemot is very common about the Channel
Islands in Autumn and winter, but is seldom seen during the summer
season except near its breeding stations, which, as far as my district
is concerned, are very few. It does not breed in Guernsey, Sark, or
Herm, or even on the rocky islands to the north of Herm. In Alderney, I
am told, it has one small station on the mainland on the side nearest
the French coast. I was told of this by the person who shot the
Greenland Falcon, and by one or two of the fishermen on my last visit
to that Island. I had not time then to visit the place, and on former
visits I must quite have overlooked it. Captain Hubbach, however, kindly
promised that he would visit the spot, and soon after I left, about the
middle of June, 1878, he did so, and his account to me was as
follows:--"I have been twice along the cliffs with my glass, but have
not seen either a Guillemot or Razorbill. An old boatman here tells me
that he took their eggs off the rocks at the French side of Alderney
last year (1877), and that they bred there every year. He describes the
eggs as 'the same blue and green and white ones with black spots that
are on the Ortack Rock.'" This very much confirms what Mr. Gallienne
says, in his notes to Professor Ansted's list--"The Razorbill and
Guillemot breed on the Ortack Rock and on the cliffs at Alderney." This
Ortack Rock is to the west of Alderney, between Burhou and the Caskets,
and a considerable number of Guillemots and Razorbills breed there, but
it is not to be compared as a breeding station for these birds with
those at Lundy Island and South Wales. During the s