Tt 



he collections of saltwater- and freshwater algae brought home 

 by the 2"'^ Frani Expedition, are not included in the treatises contained 

 in Vol. 4. 



The Volume must go to press without waiting for the treatment 

 of this group of plants, as the scientist who had originally engaged to 

 undertake the task, has now declared that he is not in a position to do 

 so. Besides, he states that he cannot say where many of the saltwater 

 algae are at present to be found. 



If these collections of algae should be dealt will later on, the results 

 will appear as separate treatises in the publications of „Videnskabs- 

 Selskabet, Christiania". 



Kristiania, April 1919. 



N. Wille. 



Editor. 



