122 KJELLMAN, THE ALG OF THE ARCTIC SEA. 
Localities: The Norwegian Polar Sea: Nordlanden. All the localities reported by 
Kien for P. violacea, viz. Rost, Giver, and Fleinver, are probably to be referred to 
this species. At least his collections contain no P. violacea. 
Polysiphonia Schitbelerii Fostin. 
Aret. Havalg. p. 3. 
Descr. Polysiphonia Schiibelerii Fosure, 1. ec. 
Fig. » » » ioral’ fig. 1—3. 
Remark on the species. The present species approaches very nearly to P. fibrillosa, 
as its author remarks himself, and can hardly be specifically distinguished from it. 
Through the kindness of Mr Fost I have had the advantage of seeing several spe- 
cimens. These differ rather much in habit from P. fibrillosa, especially by their very 
robust mainstems and lateral axes of the first order, which condition however may be 
partly caused by hard pressing in preserving. Until the plant has been more closely 
studied in nature, I think fit however to maintain it as a species. 
Habitat. It grows on sandy bottom mixed with stones, in 2—4 fathoms water, 
fastened to small stones and shells, together with Ceramium and Punctaria. It bears 
tetrasporangia in summer. 
Geogr. Distrib. It is known only from the Atlantic region of the Polar Sea. 
Locality:. The Norwegian Polar Sea: Finmarken in Porsanger fjord. 
Polysiphonia elongata (Hunps.) Harv. 
in Hook. Brit. Fl. p. 333; Conferva elongata Hups. Fl. Angl. p. 599. 
f. Lyngbyet J. G. AG. 
Spec. Alg. 2, p. 1004. 
Descr. Polysiphonia elongata I. Lyngbyei J. G. Ag. 1. ec. 
Pig. Ceramium brachygonium Lynes. Hydr. Dan. t. 36. 
Ersicc. Polysiphonia elongata Argscu. Alg. Scand. exsice. N:o 60. 
Syn. Polysiphonia elongata J. G. Ac. Spetsb. Alg. Bidr. p. 11. 
» » KLEEN, Nordl. Alg. p. 12. 
Habitat. This plant occurs in the Norwegian Polar Sea on shelly and dead bottom 
within the sublitoral zone in 8—15 fathoms water, bearing sporocarps and tetraspo- 
rangia in July and August. On the west coast of Sweden I have found it with such 
organs at this season, but also earlier, in May and June. Judging by the specimens 
in Kreen’s herbarium, the plant on the coast of Nordlanden enters into its period of 
rest towards the end of August. 
Geogr. Distrib. There exists a statement by J. G. AGarpu that the present species 
should have been brought home from Spitzbergen by the expedition of Toren 1861. 
I have never seen it there myself nor anywhere else in the Arctic Sea. In the southern 
part of the Norwegian Polar Sea it has been found by Keen. 
Localities: The Norwegian Polav Sea: Nordlanden at Giver isles and Fleinveer isles. 
The Greenland Sea: the coast of Spitzbergen, the particular place not being stated. 
