730 



later on (see table XXI). Of the many algae-species which are found in the 

 Cor« ////7a- formation, only some of the most important will be named 

 here. One of the commonest and most characteristic is Lomentaria 

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

 Corallina: moreover, several forms of Ceramium riihriim; Porphijra 

 leiicosticta , Polysiphonia iirceolata , and, especially in small littoral 

 pools, also P. Brodicvi; moreover Chondriis crispiis, Scytosiphon lo- 

 mentariiis, PhijUitis fascia, Diimontia filiformis, Laiirencia pinnatifida, 

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

 Dermatolithon macrocarpum f. Coiallince is found epiphytically on Co- 

 rallina-, in more sheltered places Leathesia difformis is found; the 

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

 grows, for instance at »Sundsk3er« 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 fact that in more sheltered 

 places it grows luxuriantly 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 into the 

 Ca/////7am7?zo/7-association on sloping rocks, and even sometimes pass 

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

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

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

 protected from being dried, because it often forms a subvegetation 

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

 hence it is not found in places where fresh water oozes from the 

 rocks; here the /?/?oo/y/77e/?/a-association occurs. As before mentioned, 

 the Cora//z/7a-formation grows rather far down 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 Cora////7a-formation, very 

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

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

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

 the same species as the formation from the Faeroes. According 

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

 /z/?a-formation is found in Nordland, Lomentaria articnlata however 

 being rare and but badly developed there. 



