ÖFVERSiaT AF K. VETENSK.-AKAD. FÖRHANDLINGAR 1899, N:0 8. 807 



July. Not rare at 58° N. 32° W. Rare south of Iceland 

 and at tbe Färöes. 



August. Rare at the Azores. Irminger Sea, 63° N. 25° 

 W. to 65° N. 33° W. S. of Iceland. 



September. N. of Iceland, 66° N. 18° 30' W. The Shet- 

 lands. The Irminger Sea, 64° N. 31°— 32° 30' W. — W. of Green- 

 land at Disco. 



Oc tober. The Färöes, 61°— 63° N. 5° — 10° W. 



Skeletonema costatum Grev. in 1898. 



Marcb. At 37° N. 74° W. 



April. Sparingly, south of Iceland, at 63° N. 18° 30' W. 

 July. S. of Iceland. 



August. S. of Iceland (not rare). The Shetlands. The 

 Irish Channel. 



Talassiothrix Frauenfeldii Grun. in 1898. 



March. Eare at 21' N. 17° 40' W. W. of Norway, 58° 

 N. 6° E. Abundant W. of the Färöes, 61° N. 11° W. 



April. NE. of the Azoreé, 39° N. 24° W. — S. of Ice- 

 land. Not rare from the Shetlands, along 59° — 60° N. from 4° 

 to 29° W. 



May. Not rare from 60° N. 9° W. to 57° N. 28° W., 

 common N. and W. of Rockall. 



Ju ne. Sparingly from the S. ot Iceland to Scotland, 63° 

 N. 19° W. to 60° N. 7° W. 



July. S. and W. of Iceland. At 60° N. 17° W. 



September. At 60° N. 11° W. 



Octobev. More or less rare from 61° N. 5° W. to 57° 

 N. 27° W. 



November. More or less rare from the S. of Iceland to 

 the Shetlands. 



December. Rare at 61° N. 6° W. Not rare at 62° N. 

 10° W. 



