XIV MIGRATION 377 
shore or marsh birds, a fact which suggests that they 
have been carried away involuntarily by storms. I 
have already (see p. 357) given reasons for believing 
that these birds travel over the Atlantic, not over Asia, 
to our shores. This being so, it is odd that the east of 
Great Britain claims most of the specimens obtained, 
the district of the Land’s End ranking next, while 
Ireland has few to show. It has been suggested that 
they are first carried past the north of our islands to 
Norway, where observers are few and far between, 
and -return thence with the stream of migrants to 
England. The subject has been fully discussed by 
Professor Newton.t 
SOME OF THE LITERATURE OF THE SUBJECT. 
(1) Gatke’s Die Vogelwarte Helgoland. 
(2) Newton’s article on “ Migration,” Dzctionary of Birds, 
vol. ii., pp- 547-572. 
(3) Wallace’s Geographical Distribution of Animals. 
(4) Seebohm’s Geographical Distribution of the Charadritde. 
(5) Seebohm’s Szberza in Europe. 
(6) Palmen’s Zugstrassen der Vogel. 
(7) Articles and letters in Mature and the Jézs ; also papers 
referred to in footnotes in the course of this chapter. 
(8) Howard Saunders’ Manual of British Birds. 
A NOTE ON GEOGRAPHICAL DISTRIBUTION. 
Though birds are such travellers, yet different parts 
of the globe have their characteristic Avifauna. Mr. 
Sclater’s division of the world into six ornithological 
regions has guided Dr. Wallace in his great work on 
the Geographical Distribution of Animals and Plants. 
1 Dictionary of Birds, vol, ii., p. 548. 
