805 



In Klaksvig and Vestmanhavn it grows under exactly similar outer 

 conditions; in both piaces, especially in Vestmanhavn, much fresh 

 and cold water streams down the rocks into the sea, and the 

 temperature of the sea can be fairly low in winter, especially in 

 the upper water layers. At Svino it grows on an exposed coast 

 but at a high level in a large water basin which is only inundated 

 by the sea at high-tide and by rough seas; here also the tempera- 

 ture of the water can of course be somewhat reduced in the winter. 



Whilst this species has thus only been found in the northern 

 territories of the islands, there are also some few others which 

 have only been found at the southern and western coast. Griffithsia 

 setacea, for instance, has only been found in Trangisvaagfjord on 

 Sj'dero, likewise Polysiphonia violacea; Laurencia pinnatifida has 

 only been gathered in Trangisvaagfjord and at Hojvig on Stromo; 

 very stunted specimens of Nitophyllum laceratiim on the west coast 

 of Stromo, south of Kvivig and, according to Simmons, Edocarpiis 

 veliitinns in Kvalbofjord on Sydero, but it is certainly not excluded, 

 that these and a few other forms, hitherto only found at the southern 

 and western half of the islands, may also be found farther north. 



In this connection it should be pointed out, that the Færoes form 

 the southern limit ^ of several species of northern distribution, as well 

 as the northern limit of several species of southern distribution. 



Among the former should be mentioned, besides the above 

 mentioned Halosaccion ramentaceiim , also Ptilota pectinata, Rhodo- 

 chorton penicilliforme , Rhodophyllis dichotoma, which is, however, 

 reported as found at Bergen in Norway, that is, almost as far south- 

 w^ard, and a few more. Of species having their north-western limit 

 here (the real northern limit of several of these species is on the 

 west coast of Norway) the following should be mentioned: Porphijra 

 leucosticta, Callophyllis laciniata, Callocolax neglecta, Nitophyllum 

 laceratiim, Griffithsia setacea, Callithamnion grannlatiim, Rhodochorton 

 seiriolaniim, Lithothamnion lævigatiim, Lithophylhim incrustans, Ec- 

 tocarpus liicifiigus, E. velutinus, Himanthalia lorea, Valonia ovalis, 

 and several others. 



4. The Origin of the Marine Algæ-flora of the Færoes. 



Kjellman (48, p. 58—77) and Reinke (68, p. 96—99) are cer- 

 tainly right in supposing that both the European and American 



^ Several of these species are, however. found still farther south on the east 

 coast of America on the Atlantic Ocean. 



