KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 20. N:0 5. 269 
f. typica, and resembles rather much a Cotlonema. The form in question is not in- 
dependant, approaching sometimes so nearly to the typical that it is difficult to draw 
a limit between them. The form distributed in Arescu. Alg. Scand. Exsicc. under N:o 
321 is the most common in the Arctic Sea proper. 
Habitat. This species is chiefly litoral in the Norwegian Polar Sea, occasionally 
sublitoral as in the other parts of the Arctic Sea. It does not descend to any consider- 
able depth, growing usually epiphytical on other alge, mostly Chordaria, not seldom 
attached to stones. It occurs on the coast of Norway in rather considerable masses 
and flourishes at exposed as well as sheltered points. On the coast of Norway it bears 
zoosporangia during all the summer, at least to the middle of September. On the coast 
of Spitzbergen I have collected it with such organs both in summer (August) and 
winter (December). 
Geogr. Distrib. Known only from the Polar Sea north of the Atlantic. It is 
most abundant and most richly developed in the Norwegian Polar Sea. The most 
northern point is Musselbay on the north coast of Spitzbergen, Lat. N. 79° 53’. 
Localities: The Norwegian Polar Sea: Nordlanden, common and abundant; Fin- 
marken: Gjesver (f. fragilis) abundant, Mageré Sound and Oxfjord (f. typica) common 
and abundant. 
The Greenland Sea: local and scarce on the north-west and west coasts of Spitz- 
bergen. 
The Murman Sea: the coast of Russian Lapland and Samoyede-land; on the west 
coast of Novaya Zemlya rather common, but not abundant. 
The White Sea: probably common and abundant (cp. Gost |. ec. p. 11). 
Baffin Bay: the west coast of Greenland: Lichtenau. 
Dictyosiphon foeniculaceus (Hups.) Grev. 
Alg. Brit. p. 56. Conferva foeniculacea Hups. Fl. Angl. p. 164. 
f. typica. 
Descr. Dictyosiphon foeniculaceus Arescu. Obs. Phye. 3, p. 30. 
Fig. » » » Phye. Scand. t. 7. 
Exsice. » » » Alg. Scand. exsice. N:o 103 et 319. 
f. flaccida ARescu. 
Subspec. Dictyosiphon flaccidus Argscu. Bot. Not. 1873, p. 169. 
Descr. Dictyosiphon foeniculaceus var. flaccidus Arescu. Obs. Phye. 3, p. 31. 
Syn. Chordaria flagelliformis var. J. G. Ac. Grénl. Alg. p. 110; sec. spec. 
Dictyosiphon foeniculaceus @ Arescu. Phye. Seand. p. 370. 
» » Croat, Fl. Disc. p. 458. 
» » Dickigz, Alg. Sutherl. 1, p. 141; Alg. Cumberl. p. 237; Alg. Nares, p. 7. 
» » Gopi, Algenfl. Weiss. Meer, p. 66. 
» » Harv. Fl. West-Esk. p. 49. 
» » KseLiM. Spetsb. Thall. 2, p. 38, excl. subspec. 2; Algenv. Murm. 
Meer. p. 47. 
» » Keen, Nord]. Alg. p. 34. 
