348 ERNST 0STRUP! MARINE DIATOMS FROM THE COASTS OF ICELAND 



The names Europe, Africa, Asia, America, Australia, Greenland, 

 Arctic Seas are abbreviated in the text respectively as follows : Eu., 

 Afr., As., Am., Austr., GrL, A. S. 



Freshwater forms are frequently found in the samples examined 

 from the coasts of Iceland; these are however excluded in this 

 paper, but will be included in a future work dealing with the 

 fresh-water diatoms of Iceland. On the other hand, several forms 

 found in brackish water are here included. 



