KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 20. N:o 5. 125 



Geogr. Distrib. This species has its maximum of frequency in tlie Greeuland Sea 

 on the coasts of Spitzbergen. It attains its maximum of luxuriancy on the north coast 

 of Norway where it forms rich, dense tufts more than 20 cm. in length. It is reported 

 from all parts of the Arctic Sea except the American Arctic Sea. But it is probably 

 to be found even hei"e, and may thus be numbered among the circuinpolar species. 

 The northernmost place where it is known with certainty, is the North Cape of Spitz- 

 bergen Lat. N. 80° 31'. 



Localities: The Norwegian Polar Sea: Finmarken at Maasö and Gjesva^r, scarce 

 and local. 



The Greenland Sea: common and very plentiful on the north and west coasts of 

 Spitzbergen; known also from Storfjord to the east of western Spitzbergen and from 

 Sabine Isle on the east coast of Greenland. 



The Murman Sea: the coast of Russian Lapland, Kolgujew Isle, the west coast of 

 Novaya Zemlya and Waygats, in the latter place common but less abundant. 



The White Sea: common and plentiful. 



The Kära Sea: Uddebay on the east coast of Novaya Zemlya Lat. N. 76° 18' 

 Long. O. 92° 20', Cape Palander, and Actinia Bay, everywhere scanty, though at several 

 place pretty widely dispersed. 



The Siberian Sea: the north coast of Tshuktshland, scanty and local. 



Baffin Bag: Cumberland Sound, pretty common, at several places on the south 

 and west coasts of Greenland, as Nenese, Tessarmiut Bay, Godhavn, Jacobshavn (?), 

 Disco Isle. 



Polysiphonia atrorubescens (Dillw.) Grev. 



Fl. Ediub. p. 308. Conferva atrorubescens Dillw. Brit. Conf. t. 70. 



Syn. Polysiphonia atrorubescens J. G. Ag. Spetsb. Alg. Till. p. 48. 



The habitat of this species in the Arctic Sea is unknown to me. 

 Geogr. Distrib. and Localities. Cp. J. E. Ag. 1. c. 



Polysiphonia byssoides (Good. et Woodw.) Grev. 



Pl. Edinb. p. 309. Fuous byssoides Good. et Woodw. Linn. Träns. 3, p. 229. 

 Descr. Polysiphonia byssoides J. G. Ag. Speo. Alg. 2, p. 1042. 

 Fig. >> » Hauv. Phyc. Brit. t. 284. 



Exsicc. » » Aresch. Alg. Soand. e.\sicc. N:o 66. 



Syn. Polysiphonia byssoides Kleen, Nordl. Alg. p. 14. 



Habitat. It grows, according to Kleen, in Nordlandeu on shelly bottom in deep 

 water, and has been found here with sporocarps in July and August. 



Geogr. Distrib. It is known only from the southern part of the Atlantic region 

 of the Polar Sea. 



Localities: The Norwegian Polar Sea: at Fleinvasr and Givajr Isles in Nordlanden, 

 which are accordingly the northernmost places of growth hitherto known of the species. 



