— 202 — 



Whether a regular shedding of the lamina in Alaria esculenta 

 is to be found elsewhere just as is the case with e. g. Laminaria 

 liyperborea and L. saccharina I dare not say a priori. I confess 

 that I can hardly believe it; partly, because it seems to me that 

 the leaf of Alaria with its strong midrib speaks against it, partly 

 also because I think it very remarkable that this fact should never 

 have been delineated. That Alaria under unfavourable conditions 

 such as in my opinion prevail on the coast of South Norway during 

 the warm season can loose most, perhaps the whole of the lamina 

 is very natural, but this cannot be called a regular change of the 

 lamina. 



