KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 20. N:0 5. 258 
Halntat. This species lives somewhat gregarious in rock-pools within the litoral 
zone, on exposed as well as sheltered coasts, seldom attached to stones, usually to 
litoral alg as Corallina officinalis, Polysiphonia nigrescens, Ahnfeltia plicata, Cladophora 
rupestris. On the coast of Norway it has zoosporangia during the latter part of the 
summer, in August and September. 
Geogr. Distrib. Known only from the Norwegian Polar Sea. Its northernmost 
point is Oxfjord in Finmarken about Lat. N. 70°. 
Localities: The Norwegian Polur Sea: Nordlandeu common according to Kieren; 
Finmarken local and scarce at Oxfjord. 
Gen. Elachista Duby. 
Mem. Cer. 1, p. 19; sec. J. G. Aa. Spec. Alg. 1, p. 7. 
Elachista fucicola (Veti.) ARESCH. 
Alg. Pugill. p. 235. Conferva fucicola Veit. Mar. Plant. N:o 4, sec. Arescu. |. e. 
Descr. Elachista fucicola Akgscu, Phyc. Seand. p. 377. 
Fig. » » » » » tipe ced fig. Ge 
Exsice. » » » Alg. Scand. exsice. N:o 102. 
Syn. Conferva fucicola We. Fl. Lapp. p. 514. 
» » Posr ‘et Rupr. Ill. Alg. p. IL @). 
Elachista fucicola Arescu. Phyc. Seand. p. 377. 
» » Croat, Fl. Disc. p. 458. 
» » Dickig, Alg. Cumberl. p. 237; Alg. Sutherl. 1, p. 141. 
» » Gost, Algenfl. Weiss. Meer. p. 72. 
» » KJELLM. Spetsb. Thall. 2, p. 31; Algenv. Murm. Meer. p. 42; Kariska hafvets 
algv. p. 27. 
» » Kieen, Nordl. Alg. p. 35. 
Habitat. In the Norwegian Polar Sea the present species is litoral; in other parts 
of the Polar Sea I have always found it sublitoral. It is always attached to other alga, 
usually uci, but often other species, as Rhodomela lycopodioides, Halosaccion ramenta- 
ceum, Rhodymenia palmata, Chondrus crispus, Gigartina mamillosa, Porphyra laciniata, 
Chetomorpha melagonium. It flourishes both on exposed coasts and in sheltered locali- 
ties, for instance, in the interior of deep bays. On the north coast of Norway it occa- 
sionally occurs gregarious and contributes rather essentially to mark the character of the 
vegetation on ranges of comparatively large extent. On the coast of Spitzbergen I have 
found that form of the species which has been named f. globosa. It bears sporangia 
through all the summer on the coast of Norway. At Spitzbergen it has been found 
with such organs in February, March, July, and August, on the west coast of Novaya 
Zemlya in July. 
Geogr. Distrib. With the exception of the American Arctic Sea, this species is 
known in all parts of the Arctic Sea. Its most northern point is Musselbay on the 
north coast of Spitzbergen Lat. N. 79° 53. 
