748 



found almost anywhere on the coasts of the Faeroes. The formation 

 constantly adapts itself to the' more or less exposed situation of the 

 locality and hy aid of tlie Fiicacece-\ egeiai'ion , it may as a rule he 

 easily determined whether a certain locality is sheltered or exposed. 



The Fzzcaceop- formation of the Faeroes seems to agree well w^ith 

 Rosenvinge's of the coasts of Greenland. According to Strom- 

 felt's somewhat scanty description (80, p. 10), a very similar vege- 

 tation must he found on the coasts of Iceland. If we compare the 

 Fiicacece-^ormaiion of the coast of Norwa}^ described among others 

 by Hansteen (38, p. 351 — 52) and Boye (6, p. 27), we at once ob- 

 serve that they are essentially different from a floristical point of 

 view% as Fiiciis serratus, which is very common on the west coast 

 of Norway, is absent on the Faeroes; oecologically there likewise 

 seems to be a great difference between them. Boj^e writes (1. c. 

 p. 25): »Even in the most exposed localities, a very luxuriant 

 Fzzcns-vegetation is usually found«; he mentions moreover two forms 

 of Fuciis uesiculosiis, besides a f. elongata of Fiicus serratiis as being 

 found there. This is quite contrary to what we observe on the 

 Faeroes, where Fiiciis vesiciilosiis is absent on exposed coasts. The 

 only Fzzczzs- species that will thrive here are Fiiciis spiralis and 

 F. inflatus. As before-mentioned (p. 724) I doubt, however, whether 

 Boye's observations are perfectly correct. 



In the northern part of Norway, where Fiicus inflatus is com- 

 mon, the Fzzczzs-vegetation hardly differs from that of the Faeroes 

 in anything but this, that Fiicus serratiis is frequent. The Faeroese 

 Fzzczzs-vegetation also much resembles that of the Shetland Isles, ex- 

 cept that a luxuriant growth of Fiicus serratiis occurs on the shores 

 of the latter. What makes the resemblance still greater is, that Fiicus 

 inflatus has been found here (cfr. 9, p. 5). Simmons mentions (78, 

 p. 251 and 253) a Pe/z;e/za- formation and a Fucus-Ascophylliim- 

 formation found on the Faeroes. 



2. The Sublittoral Region. 



As mentioned before, I agree with Rosen vinge in determining 

 the upper boundary line of this region at about low w^ater mark, 

 at neap-tide. In the Faeroes the boundary line is almost identical 

 with the distinct upper line of the A/arza- association. Kj ell man 

 determines the lower limit of this region at the curve of 20 fathoms, 

 and he calls the area covered by algae below this, the elittoral re- 



