164 KJELLMAX, THE ALG^ OF THE ARCTIC SEA. 



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

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



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

 occurring among the 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 have found it 

 with young nemathecia at Finmarken in August, on the west coast of Waygats 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 

 region 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: Gjesva^r, Oxfjord, Talvik, local 

 and scarce. 



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

 Greenland. 



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

 west coast of Novaya Zemlya from S. Gusinnoi Cape and the west coast of Waygats, 

 at the latter place common and abundant; Jugor Shar. 



The White Sea: at several places. 



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



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



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

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



« » Kjellm. Spetsb. Thall. 1. p. 21. 



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

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

 Sijn. Phyllophora Brodiiei Harv. F1. West-Esk. p. 49. (?) 



» » WiTTR. in Heugl. Reise p. 284; sec. spec. 



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



" » Eaton, List, p. 44. 



>i " Gobi, Algenfl. Weiss. Meer. p. 41. 



Kjellm. Vinteralgv. p. 64; Spetsb. Thall. 1, p. 20, Algenv. Murm. Meer. p. 

 20; Kariska hafvets Algv. 21. 

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

 » » Dickie, Alg. Walker, p. 86. 



» » Harv. Ner. Am. 2, p. 149. 



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

 Corallinece, 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 



