KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 20. N:0 5. 85 



new parts during the winter. With regard to this, it must be taken into account, that 

 in consequence of the masses of ice and snow only a slight quantity of light penetrates 

 to the arctic algae growing at a greater depth, even during a considerable part of the 

 80 called light season. Thus I think it may be said that the arctic sea-algse, as inde- 

 pendently assimilating plants, need uncommonly little warmth and light. 



