270 KJELLMAN, THE ALG OF THE ARCTIC SBA. 
Syn. Scytosiphon foeniculaceus Lynes. Hydr. Dan. p. 63; ex parte. 
» » Nyl..et Sel. p. 73. 
» » Post. et Rupr. Ill. Alg. p. II. 
Habitat. This species is litoral in the Norwegian Polar Sea, epiphytic on Fucacee, 
sublitoral in other parts of the Arctic Sea, chiefly attached to Chordaria flagelliformis 
or stones. It-grows rather scattered both on exposed and on sheltered coasts. On 
the north coast of Spitzbergen there occurred through the whole winter an intermediate 
form between the typical one and f. flaccida. It retained its characteristic appearance 
and was in development all the time. At Nordlanden it bears zoosporangia during the 
summer, at Finmarken in August and September, at Spitzbergen in July and August, 
on the west coast of Novaya Zemlya in July. 
Geogr. Distrib. Known from the Polar Sea north of the Atlantic. The maximum 
of frequency is on the north coast of Norway. The most northerly point where it has 
been found is Rawlingsbay in Smith Sound Lat. N. 80° 20’. 
Localities: The Norwegian Polar Sea: Nordlanden, common and abundant; Fin- 
marken, common and abundant: Mageré Sound, Maasé, Gjesver, Oxfjord, and Talvik. 
The Greenland Sea: the north and west coasts of Spitzbergen rather common, but 
not abundant. 
The Murman Sea: the coast of Russian Lapland, the west coast of Novaya Zemlya 
local, but rather plentiful. 
The White Sea: probably common and plentiful (cp. Gost |. c. p. 11). 
Baffin Bay: Cumberland Sound not rare; the west coast of Greenland at Tessar- 
miut, Lichtenau, Neuherrnhut, Godthaab, Holstenborg, Egedesminde, Hunde Islands, 
Jakobshayn, Claushavn, Disco Isle, Rittenbenk, Sakkak, Rawlingsbay, probably commonly 
disseminated along the whole coast (cp. Croatt 1. c.). 
Both the mentioned forms have the same extent of distribution, but according 
to my experience f. flaccida and forms most closely related with it are the most common 
in the North. 
Dictyosiphon hispidus Ksrtim. 
Algenv. Murm. Meer. p. 47. 
Descr. et Fig. Dictyosiphon foeniculaceus subspec. hispidus KyeELLM. Spetsb. Thall. 2, p. 39 et t. 2, fig. 1. 
Syn. Enteromorpha ramulosa ZELLER, Zweite d. Polarf. p. 84; sec. spec. 
Remark on the species. Gopi supposes this alga to be a D. foeniculaceus f. flaccida 
somewhat more richly branching. It certainly reminds one of f. flaccida by its soft, 
flexible, very tubulose frond, but it differs from it partly by smaller zoosporangia, 
partly by its peculiar branching. In the case of a genus with so feebly marked forms 
as Dictyosiphon it must however in a certain degree be arbitrary whether a given form 
should be considered a variety or a species. The chief reason why I think it is more 
differentiated than f. flaccida and other forms of Dictyosiphon is the fact that it is found 
with its characteristic habit in widely distant parts of the Arctic Sea. 
