17 



lu determiuing the mean direction of luigratiou of the experiments at Fair 

 Isle, the second method previously referred to was also adopted, with results set 

 forth in the following table : — 



Adult Males. 



N. and E. 



Date. 



4 Nov. 1910. 

 15 Sept. 1910 

 Do. 

 Do. 



11 Apr. 1911. 



12 Oct. 1911. 

 19 June 1912. 

 22 Nov.4912.i 



4 Nov. 1910. 

 15 Sept. 1910. 

 Do. 

 Do. 



11 Apr. 1911. 



12 Oct 1911. 

 19 June 1912. 

 22 Nov. 1912. 



No. of 

 Fish. 



Distance. 



Miles. 



115-5 

 1- 



79- 



S. and E. 



236- 



378-2 



397- 

 293-6 



Mean 

 Direction. 



N. 53° E. 



N. 27° E. 

 N. 29° E. 

 N. 27° E. 



S. 28° E. 

 S. 7°E. 



S. 3°E. 

 S. 53° E. 



N. and W. 



No. of 

 Fish. 



14 



4 

 1 

 1 

 3 

 3 

 2 



28 



47 

 3 



38 

 3 

 7 

 9 

 5 



10 



122 



Immature Males. 



[Tablb. 



