724 



from the Færoes is likewise found here in the most exposed piaces. 

 It consists of Fiiciis spiralis (most probably f. nana) and Fucus in- 

 flatus f. disticha^. They are most often attached to the Balanus. 

 They grow partly intermingled, partly with Fucus spiralis extend- 

 ing a little higher up than Fucus inflatus. Fucus spiralis disap- 

 pears where the surf is the most vigorous. Thus Fucus inflatus is 

 also here the Fucus which is the hest fitted for resisting the dash- 

 ing of the waves.« According to this description, this Norwegian 

 vegetation seems to correspond perfectly with that of the Færoes. 



It is true that Boye (l.c. p. 25) speaks of a Fwcus-formation grow- 

 ing on the outer side of the rocks; he says, that »even in the most ex- 

 posed localities a very hixuriant Fucus-vegetation is usuaUy found.« 

 As members of this vegetation, he mentions, however, Fucus serratus 

 f. elongata, and two forms of Fucus vesiculosus, which makes it quite 

 clear, that his FncHS-vegetation is widely different from the Færoese. 

 Fucus serratus is nowhere found in the Færoes, and Fucus vesi- 

 culosus grows here essentially on the inner side of rocks; it is the 

 species of Fucus which I have mentioned before as disappearing 

 first in passing from sheltered to exposed coasts. I am on the 

 whole rather dubious as to the correctness of Boye's report. During 

 a journey in Norway in 1904 I stayed for a few days at Christians- 

 sund, in order to observe the algæ-vegetation, and I found Fucus 

 vesiculosus only in sheltered piaces. Mr. Norum also kindly in- 

 forms me, that Fucus vesiculosus is never found in very exposed 

 piaces in the neighbourhood of Haugesund, whilst Fucus serratus can 

 grow on a very exposed coast immediately below the Balanus-helt. 



Nor doesKleen (51) mention any such Fzzczzs- vegetation ; yet it 

 must be supposed that a formation similar to that of the Færoes 

 is found in Nordland. 



Mag. Jonsson reports, that a Fticus-formation, very much like 

 this, is found in Iceland on exposed coasts, and Stromfelt writes 

 (80, p. 10): »On the clifFs of Seley which are constantly washed 

 over by the surf, a particular Fwcacé-formation is found. It consists 

 of Fucus spiralis, Fucus evanescens *dendroides, which are through 

 many intermediate forms connected with f. nana of *arcticus and 

 t contracta of '-^'norvegicus that are likewise found here^«. This vege- 



^ Mr. Norum has kindly presented me with specimens of both species, fully 

 agreeing with tliose from tlie Færoes. 



* På de af ståndiga branningar ofverspolade strandlilipporna på Seley upp- 

 trådde en egendomlig Fucacé-formation, bildad af Fucus spii-alis, Fucus evanescens 



