KONGL. SV. VET. AKADEMIENS HANDLINGAB. BAND 20. N:0 5. 275 



Syn. Conferva pennata Wg. F1. Lapp. p. 512; ex parte sec. herb. 

 Spacelaria arctica J. G. Ag. Grbnl. Alg. p. 110. 

 » » Dickie, Alg. Cumber], p. 238. 



» » Gobi, Algenfl. Weiss. Meer. p. 62. 



» » Kjellm. 'Vinteralgv. p. 65; Spetsb. Tliall. 2, p. 34; Algenv. Murm. Meer. p. 43; 



Kariska hafvets algv. p. 28. 

 » » Kleen, Nordl. Alg. p. 36. 



» cirrhosa Post, et Rupu. 111. Alg. p. II. 



» heteronema Post, et Eni'R. 1. c. Cfr. Gobi 1. c. p. 62, in adnot. 



Habitat. This species is literal 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 Laniinariaceoe, in 2 — 5 fathoms water. It is attached to other algas 

 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 I 

 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 Gjesvasr, the south coast of Magero, 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. Gobi 1. c. 



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 Godhavn. 



Sphacelaria olivacea (Dillw.) Ag. 



Spec. Alg. 2, p. 30. Conferva olivacea Dillw. Brit. Conf. p. 57. 

 Desor. Sphacelaria olivacea J. G. Ag. Spec. Alg. 1, p. 30. 

 Fig. » radicans Hakv. Phyo. Brit. t. 189. 



Exsicc. » olivacea Kjellm. in Aresch. Alg. Scand. exsicc. N:o 410. 



Syn. Sphacelaria olivacea Kleen, 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- 



