bo 
os 
KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 20. N:0 5. | 
Polysiphonia fastigiata (Rorn) Grey. 
Fl. Edinb. p. 308; Ceramium fastigiatum Rorn. Fl. Germ. 3, p. 463, 
Descr. Polysiphonia fastigiata J. G. AG. Spec. Alg. 2, p. 1029. 
Liq. » » Harv. Phyc. Brit. t. 299. 
Exsice. » » ArescH. Alg. Scand. exsicc. N:o 4. 
Syn. Conferva polymorpha Gunn. Fl. Norv. 2, p. 92; fide. syn. 
» » We. Fl. Lapp. p. 511. 
Hutchinsia fastigiata Lynas. Hydr. Dan, p. 108. 
Polysiphonia —» J. G. Aa. Spetsb. Alg. Bidr. p. 11. 
» » ArescH. Phyc. Shand. p. 278. 
» » KJELLM. Spetsb. Thall, 1, p. 9. 
Halitat. This plant belongs to the litoral zone and appears to attach itself almost 
exclusively to Ozothallia nodosa. When growing, as happens sometimes, on fragments 
of this species torn off and carried into deep (10O—15 fathoms) water, it becomes less 
densely branched, finer, longer, and less corymbose, the axes at the same time tapering 
more strongly towards the top. Such specimens, differing rather much in habit from 
the typical form, I have found at Maas6é in Finmarken. The present species is pelagic, 
avoiding at least deep bays, and somewhat gregarious. According to KLEEN, it bears 
sporocarps and tetrasporangia during all the summer in the southern part of the Nor- 
wegian Polar Sea. On the coast of Finmarken it occurred with sporocarps during the 
months of August, September and October, with tetrasporangia in August. 
Geogr. Distrib. This species has its maximum of frequency in the Norwegian 
Polar Sea. Lynoapyx has reported it from Baffin Bay. It seems uncertain as yet whether 
it occurs really also at other places in the Arctic Sea. It is certainly considered us 
native in the Greenland Sea on the coast of Spitzbergen. I have indeed found it here 
myself, though never attached, but only washed ashore, having probably drifted there 
from the south. This was possibly the case also with those specimens which were 
brought home from the same region by Torell’s expedition 1861. In the White Sea 
it has not been noticed at all. For the time being, Gjesver immediately north of 71° 
N. Lat. must be regarded as the northernmost place where it has been with certainty 
found to grow. 
Localities: The Norwegian Polar Sea: Nordlanden, Tromsé amt at Tromsé, Rend, 
and Karlsé; Finmarken at Maasé, Gjesver, Oxfjord, and the southern coast of Magerd, 
everywhere common and plentiful. 
The Greenland Sea: the coast of Spitzbergen (?). 
Lajfjin Bay: the west coast of Greenland. 
Polysiphonia arctica J. G. Ae. 
Spec. Alg. 2. p. 1034. 
Descr. Polysiphonia arctica J. G. Ac. 1. c. et Goxi, Algenfl. Weiss. Meer. p. 26. 
Exsice. » »  Kggtum. in Arescu. Alg. Scand. exsice. N:o 403. 
Syn. Conferva nigra R. Br. in Scoresby, Account. 1. App. 5(?) 
Hutchinsia badia Post et Rupr. Ill. Alg. p. II. Cfr. Gost, 1. c. p. 27. 
» stricta LinpBL. Bot. Not. p. 158. 
