788 



lands, as almost all Ihe F'æroese algæ are found on the coasts of 

 Scotland, whereas Scotland has on the other hånd a very great num- 

 ber of species, which are wanting at the Færoes. The greatest resem- 

 blance is between the Færoese algæ-flora and that of the Shet- 

 land Isles; the Færoes have a few, perhaps no more than 6, spe- 

 cially norlhern species which will most probably not be found on 

 the Shelland Isles; on the other band the Shetland Isles have a 

 number (how many can only be staled when a more thorough in- 

 vestigation of the algal vegetation of these islands has been under- 

 taken) of forms from more southern countries which do not grow 

 any farther north than the Shetland Isles. 



From the British Isles the comparison most naturally passes 

 to the west coast of Norway. Boye (6) has given a list of the 

 algæ found by him at a part of the coast, round Sulen north of 

 Bergen. This part of the coast is at about the same degree of la- 

 titude as the Færoes, and consequently of special interest; but un- 

 fortunately Boye's list is rather defective, as is clearly proved 

 by the faet that such species as Fucus spiralis, Desmarestia viridis, 

 Odonthalia dentata, Enteromorpha Linza and others, are not men- 

 tioned. I have therefore made an attempt to supplement Boye's 

 list, partly by including the species mentioned by Areschoug in 

 his well-known work: »Phyceæ scandinavicæ marinæ« (3), even if 

 these algæ are not specifically stated as belonging to Bergen and 

 its neighbourhood but only from some locality on the Norwegian 

 west coast south of Trondhjem, partly by adding the species which 

 Hansteen mentions in his paper (38). Further, several species from 

 the west coast of Norway are mentioned in different papers by 

 Foslie (e. g. 25, 27); and Mr. E. Norum of Haugesund, who has 

 been investigating the algæ-vegetation in this neighbourhood, has 

 kindly placed his still unpublished list of brown algæ from this part 

 of the west coast at my disposal. Lastly, Chantransia Alariæ has 

 been found by Rosen vinge at Haugesund and by me at Chri- 

 stianssund. Of the species mentioned in Boye's list (according to 

 my calculation about 165, wdiich number will certainly be much 

 increased on further investigation), 97 are found at the Færoes, but 

 if we include the species, which are stated by the various authors 

 mentioned as found on the west coast of Norway, the total num- 

 ber of common species is increased by at least 40, which makes in 

 all about 137 species or about 64% of the Færoese algæ. If we ex- 

 clude the green and bluish-green algæ, 190 Rhodophyceæ and Phæo- 



