The kittiwake represented in the engraving (a young bird killed shortly after the breeding season) affords a curious example of the variations which frequently occur in the form and relative length of the tail and wdng-feathers of this and many other gulls. The tail in the adult bird is square, or nearly so, at the end, whilst that of the bird figured is considerably forked — a peculiarity which in almost any other genus might be considered as a mark of specific distinction.
Ivory Gull, Larus eburneus. Mr. Miller has a fine specimen, killed some years since at Yarmouth.
Common Gull, Larus canus. Common on the coast, except dur- ing the nesting season, and most numerous in autumn.
Iceland Gull, Larus leucopterus. Very rare in adult plumage ; but the immature birds are not unfrequently met with late in the autumn.
Lesser Black-backed Gull, Larus fuscus. Occurs on the coast throughout the year, except during the nesting season ; but not in large numbers.
Herring Gull, Larus argentatus. Common on the coast at the same seasons as the last species.
Great Black-backed Gull, Larus marinus. Common on the coast, except in the breeding season. Both this and the two preceding species are somewhat more numerous in autumn than at any other time of the year.
Glaucous Gull, Larus glaucus. Has been occasionally killed, generally in immature plumage.
Common Skua, Lestris catarractes. The common skua is some- times met with in Norfolk; most commonly in autumn.
Pomarine Skua, Lestris pomarinus. Of occasional occurrence ; especially immature birds in autumn.
Richardson's Skua, Lestris Richardsonii. The immature birds, in various stages of plumage, are occasionally found in autumn ; but the adult birds are rare.
Buffon's Skua, Lestris parasiticus. The young birds not un- frequently occur in autumn, in a manner similar to the preceding species.
Fulmar Petrel, Procellaria glacialis. Sometimes taken off the coast in autumn.
Manx Shearwater, Puffinus Anglorum. Rare. Sir Thomas Browne refers to "a sea-fowl called a sherewater, somewhat billed like a cor-
