wa | 
KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 20. N:0 5. 27 
Syn. Conferva pennata Wea, Fl. Lapp. p. 512; ex parte sec. herb. 
Spacelaria arctica J. G. AG. Gronl. Alg. p. 110. 
» » Drekie, Alg. Cumberl. p. 238. 
» » Gost, Algenfl. Weiss. Meer. p. 62. 
» » KyeLum. Vinteralgv. p. 65; Spetsb. Thall. 2, p. 34; Algenv. Murm. Meer. p. 45; 
Kariska hafvets algy. p. 28. 
» » Kieren, Nordl. Alg. p. 36. 
» cirrhosa Posr. et Rupr. Ill. Alg. p. HI. 
» heteronema Post. et Rupr. |. c. Cfr. Gor |. ec. p. 62, in adnot. 
Habitat. This species is litoral in the Norwegian Polar Sea, but in other parts 
of the Arctic Sea it occurs on the upper part of the sublitoral zone, usually within 
the formation of Laminariacew, in 2—5 fathoms water. It is attached to other alge 
or stones, and grows scattered. Apparently it prefers rather exposed localities. At 
Spitzbergen I have found it with zoosporangia in December, January, and April, and 
with gametangia in February, March, and April. In other parts of the Arctic Sea | 
have met only with sterile specimens. 
Geogr. Distrib. This alga is extensively distributed in the Arctic Sea, probably 
circumpolar. The northernmost point where it occurs is Low Island on the north 
coast of Spitzbergen Lat. N. 80° 20’. Its maximum of frequency is within the Spitz- 
bergen province. In the greatest luxuriancy it has been found in the Kara Sea. 
Localities: The Norwegian Polar Sea: Nordlanden not rare; Finmarken local and 
scarce, at Gjesveer, the south coast of Mageré, and Oxfjord. 
The Greenland Sea: the north and west coasts of Spitzbergen common and rather 
abundant. 
The Murman Sea: the coast of Cisuralian Samoyede-land, Kolgujew Isle, the west 
coast of Novaya Zemlya and Waygats rather common, even abundant in some places. 
The White Sea: cp. Gost 1. ¢. 
The Kara Sea: Uddebay rather abundant and very luxuriant; Cape Palander scarce; 
Actinia Bay rather abundant; Cape Tshelyuskin rare. 
The Siberian Sea: Koljutshin Isle; Pitlekay, and the coast east of this point, 
rather common and abundant. 
Baffin Bay: Cumberland Sound, not rare; the west coast of Greenland at Neu- 
herrnhut and Godhayn. 
Sphacelaria olivacea (Dittw.) Ac. 
Spec. Alg. 2, p. 30. Conferva olivacea Dititw. Brit. Conf. p. 57. 
Vescr. Sphacelaria olivacea J. G. Ac. Spec. Alg. 1, p. 30. 
Fig. » radicans Harv. Phyc. Brit. t. 189. 
Exsice. » olivacea KyeLum. in Arescu. Alg. Scand. exsice. N:o 410. 
Syn. Sphacelaria olivacea Kieen, Nordl. Alg. p. 36. 
Habitat. A litoral alga, growing gregarious on stones or poles, usually in shel- 
tered localities. From the Polar Sea, where it has as yet been collected only in sum- 
