ÖFVERSIGT AF K. VETENSK.-AKAD. FÖRHANDLINGAR 1899, N:0 8. 797 



June. W. of Norway at 62° N. 2=30' E. — S. of Beeren 

 Island (73° N. 22° E.) — E. of Spitzbergen. — W. of Green- 

 land (69° N. 54° W.) — S. of Newfoundland. 



July. N. of Icelaud. W. of Norway, at 64° N. 3° E. — 

 Spitzbergen, 78° N. 0°— 7° 30' E. 



August. N. of Iceland and of the Färöes. Round Spitz- 

 bergen — Davis Strait, 66' N. 55° W. to 69° N. 53° E. New- 

 foundland banks, from 42° N. 48° W. to 52° N. 55° W. 



September. Between Beeren Island and Spitzbergen. W. 

 of Greenland, from 60° N. 55° W. to 69° N. 53° W. — NE. 

 of Newfoundland (54° N. 45° W.). 



October. Davis Strait. Very abundant in the Labrador 

 current, from 52° N. 52° W. to 46° N. 47° W. 



November. Atlantic at 48° N. 33° W. and 49° N. 

 23° W. Very abundant in the Labradorcurrent along the iine 

 between 53° N. 50° W. — 47° N. 41° W. and 42° N. 64° W. 



December. Round Newfoundland at 47° N. 45' W., 42° 

 N. 48° W. and 42° N. 63° W. 



January 1899. On the Iine 43° N. 57° W. to 49° N. 20° W. 



Biddulpliia aurita Lyngb. in 1898 and 1899. 



1898 March. At 52° N. 6° E. (mouth of the English 

 Channel). 



April. Abundant at Westmannaö. . 



May. Rare W. of Jan Mayen (72° N. 16° W.), not rare 

 at Westmannaö. 



1899 March. Very common N. and W. of Iceland {66° 

 N. 20° W. and 65° N. 24° W.). 



I have reported above on the seasonal distribution of the 

 raost important species, belonging to my type of triclio -plankton, 

 from which it appears that all have the same distribution in 

 the northern Atlantic. They appear south of the entrance to 

 the polar basin, spread more or less abundantly towards Spitz- 



