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



new parts dui"ing 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 alga3 growing at a greater depth, even during a considerable part of the 

 so called light season. Thus I think it muy be said that the arctic sea-alga3, as inde- 

 pendently assimilating plants, need uncommonly little warrath and light. 



