KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 20. N:o 5. 8) 
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 algw growing at a greater depth, even during a considerable part of the 
so called light season. Thus I think it may be said that the arctic sea-algew, as inde- 
pendently assimilating plants, need uncommonly little warmth and light. 
