170 WONDERS OF ORGANIC LIFE. 



observes, that in the south of Greenland some 

 few of the large sort of herrings are taken, 

 " wanderers that have strayed from the great 

 shoal that drives out of the ice-sea by Iceland 

 towards America." He regarded, as might be 

 expected, the theory of the Arctic migration of 

 the herring as correct. But he previously ob- 

 serves, that the proper herring is not an Arctic 

 'fish. There is, however, a distinct species, 

 peculiar to the northern ocean, called by the 

 Greenlanders Angmarset, or small herring, and 

 by the Newfoundland-men, capelin, which was 

 observed by sir John Franklin along the shores 

 of the Polar sea. Whatever this species may 

 be, it is not the true herring, or Clupea 

 harengns* 



The herring, then, and the salmon also, afford 

 us instances of imperfect migration. And here 

 we may adduce some other examples, by way 

 of showing, what all do not seem to understand, 

 that migration does not necessarily involve a 

 great change of latitude, (which we have called 

 perfect or complete migration,) but only a re- 

 moval from a given spot, for a definite purpose, 

 to the extent merely of one or two hundred 

 miles. Referring here to our work on British 

 Birds,f we shall select such illustrations as have 

 come under our personal knowledge, although 

 we may corroborate our opinions by the autho- 

 rity of the most eminent zoologists. As the first 

 example of imperfect or limited migration, we 



* See Yarrell's British Fishes. 



t Published by the Religious Tract Society. 



