730 



laler on (seetableXXI). Of the many algæ-species which arefound in the 

 Corrt////?a-formation, only some of the most important will be named 

 liere. One of the comnionest and most characteristic is Lomentaria 

 articLilata, which grows in dense, dark reddish tufts, intermingled with 

 Corallina; moreover, several forms of Ceramiiim nibriim; Porphyra 

 leucosticta, Polysiphonia iirceolata, and, especially in small littoral 

 pools, also P. Brodiæi; moreover Chondrus crispiis, Scyfosiphon lo- 

 mentarhis, Phyllitis fascia, Diimontia filiformis, Laiirencia pinnatifida, 

 Acrosiphonia, Hiinanthalia, Gigartina, Monostroma, and many more. 

 DernmtoUthon macrocarpiim f. Corallinæ is fonnd epiphytically on Co- 

 rallina; in more sheltered piaces Leathesia difformis is found; the 

 latter is not common, but it is abundant in the few piaces where it 

 grows, for instance at »Sundskær« in Kalbakfjorden. In this more 

 sheltered place, Chordaria flagelliformis, Dictyosiphon foeniculaceiis and 

 D. hippiiroides were also found. 



It seems as if Corallina does not stand to be dried for a long 

 time. This is clearly shown by the faet that in more sheltered 

 piaces it grows luxuriantlj^ in low-lying pools, but never outside 

 of these. I have already mentioned that on a much exposed 

 coast, e. g.. Muletangen at Viderejde, it can stretch far up inlo the 

 Callithamnion-associaiion on sloping rocks, and even sometimes pass 

 the highest water mark. But if the weather and the sea are calni 

 in summer, it is also here discoloured, and it assuredly dies, if it 

 is dried up for a long time. In such piaces Corallina is, however, 

 protected from being dried, because it often forms a subvegetation 

 under larger algæ. It is likewise not well fitted to stand fresh water; 

 hence it is not found in piaces where fresh w^ater oozes from the 

 rocks; here the /?/joc/f//J7enza-association occurs. As before mentioned, 

 the Coro//z/?a-formation grows rather far dowai in the sublittoral re- 

 gion ; this will be farther explained later on. 



Boye (6, p. 26) seems to have found a very similar Corallina- 

 vegetation on the part of the coast of Norway investigated by him. 



It is to be supposed that a littoral Co/a/Zzna- formation, very 

 similar to this, is common along large stretches of the west coast 

 of Norway; compare Hansteen's: »Broget-pelagiske- formation« 

 (p. 348), wdiich, as pointed out by Simmons (p. 260), includes about 

 the same species as the formation from the Færoes. According 

 to Kl een (51), it may also be supposed that a very similar Coral- 

 Zzna-formation is found in Nordland, Lomentaria articulata however 

 being rare and but badly developed Ihere. 



