CHAP. XIX. 



MIGRATION. 



241 



These extracts prove that part of the migration of these 

 species takes place across country ; but probably the main 

 stream follows the coast, especially in autumn, as I was 

 myself an eye-witness, the year after my return from the 

 Petchora, on the island of Heligoland. 



OLD RUSSIAN SILVER CROSS. 



I? 



