164 KJELLMAN, THE ALGiE OF THE ARCTIC SEA. 



in general characteristically different from each other, it is more fit, I think, to treat 

 them as different species tlian as forms of the same species. 



Hahitat. This alga in the Arctic Sea is sublitoral, sometimes elitoral, usually 

 occurring among tlie formation of Laminariacece. It grows in general scattered, some- 

 times somewhat gregarious, attached to small stones and shells. Although preferring 

 exposed coasts it does not limit itself exclusively to such localities. I liave found it 

 with young nemathecia at Finmarken in August, on the west coast of Waj^gats at the 

 end of July. 



Geogr. Distrib. According to my experience, this species has its maximum of 

 frequency in the most south-eastern part of the Murman Sea. It is rare in the Atlantic 

 reo-ion of the Polar Sea. Its northernmost known locality is on the north-west coast 

 of Spitzbergen, Lat. N. 79° 45'. 



Localities: The Norwegian Polar Sea: Finmarken: Gjesvajr, Öxfjord, Talvik, local 



and scarce. 



The Greenland Sea: the north-west coast of Spitzbergen, rare; the east coast of 



Greenland. 



The Murman Sea: the coast of Cisuralian Samoyede-land, Kolgujew Island, the 

 west coast of Novaya Zemlya from S. Gusinnoi Cape and the west coast of Waj^gats, 

 at the bitter place common and abundant; Jugor Shar. 



The White Sea: at several places. 



The Kära Sea: Uddebay on the east coast of northern Novaya Zemlya; Karabay. 



Phyllophora interrupta (Geev.) J. G. Ag. 



Spetsb. Alg. Progr. p. 3; Sphsbroooccus interruptus Grev. Act. Leop. 14,2, p. 423. 



Descr. Phyllophora interrupta J. G. Ag. Epior. p. 217. 



)) w Kjellm. Spetsb. Thall. 1. p. 21. 



pig. Sphserococcus interruptus Kiitz. Tab. Phyc. 19, t. 20. 

 Exsicc. Phyllophora interrupta Kjellm. in Aresch. Alg. Scand. exsicc. N:o 405. 

 Syn. Phyllophora Brodisei Harv. Fl. West-Esk. p. 49. (?) 



a » WiTTR. in Heugl. Eeise p. 284; sec. spec. 



» interrupta J. G. Ag. Spetsb. Alg. Progr. p. 3; Bidr. p. 11. 



I) )) Eaton, List, p. 44. 



)) ,) GoBi, Algenfl. Weiss. Meer. p. 41. 



» » Kjellji. Vinteralgv. p. 64; Spetsb. Thall. I, p. 20, Algenv. Murm. Meer. p. 



20; Kariska hafvets Algv. 21. 

 Rhodymenia interrupta Ashm. Alg. Hayes, p. 96. 

 n » DiCKiE, Alg. Walker, p. 86. 



» » Harv. Ner. Am. 2, p. 149. 



Habitat. A sub- or e-litoral species, growing scattered within the formation of 

 Corallinete, Lithoderma, and, not unfrequently, even of Laminariacece, generally on 

 exposed coasts, but even in sheltered places. It has been mentioned before, that it is 

 sometimes found lying loose on the bottom in great masses, cp. p. 17. On the north 

 coast of Spitzbergen it continues to develop all the year round. I found plants in 



