KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 20. N:0 5. 125 
Geogr. Distrib. This species has its maximum of frequency in the Greenland 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 em. 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 here, and may thus be numbered among the circumpolar 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 Maasé and Gjesver, scarce 
and local. 
The Greenland Sea: common and very plentiful on the north and west coasts of 
Spitzbergen; known also from Storfjord to the cast 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 Kara 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 Bay: 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 (Ditiw.) Grev. 
Fl. Edinb. p. 308. Conferva atrorubescens Dituw. 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. Ac. 1. ¢. 
Polysiphonia byssoides (Goon. et Woopw.) Grev. 
Fl. Edinb. p. 309. Fucus byssoides Goop. et Woopw. Linn. Trans. 3, p. 229. 
Descr. Polysiphonia byssoides J. G. AG. Spec. Alg. 2, p. 1042. 
Fig. » » Harv. Phyc. Brit. t. 284. 
Exsice. » » Arescu. Alg. Scand. exsicc. N:o 66. 
Syn. Polysiphonia byssoides Kieren, Nordl. Alg. p. 14. 
Habitat. It grows, according to Kuzen, in Nordlanden on shelly bottom in deep 
water, and has been found here with sporocarps in July and August. 
Geogr. Distrib. (t is known only from the southern part of the Atlantic region 
of the Polar Sea. 
* Localities: The Norwegian Polar Sea: at Fleinver and Giver Isles in Nordlanden, 
which are accordingly the northernmost places of growth hitherto known of the species, 
