264 KJELLMAN, THE ALGH OF THE ARCTIC SEA. 
Gen. Phloeospora ARESCH. 
Bot. Not. 1873, p. 163. 
Phloeospora subarticulata ARgEscn. 
[Pca peeiGae 
Descr. Phloeospora subarticulata Argscu. Bot. Not. 1876, p. 33. 
Ezsice. Dictyosiphon foeniculaceus var. subarticulatus Argscu. Alg. Scand. exsicc. N:o 104. 
Syn. Phloeospora subarticulata Gobi, Algenfl. Weiss. Meer. p. 64. 
» » KyELLM. Spetsb. Thall. 2, p. 40; Algenv. Murm. Meer. p. 45. 
Habitat. This species grows sublitoral in the Spitzbergen province, scattered, 
attached to stones, both on exposed coasts and in sheltered localities. At Spitzbergen 
I have found in July some specimens with plenty of zoosporangia. 
Geogr. Distrib. The present alga is of rare occurrence in the Polar Sea and has 
hitherto been found only in the eastern part of that region which lies north of the 
Atlantic. Even here it is everywhere scarce. The most northern point where it is 
known to occur is Fairhaven on the north-west coast of Spitzbergen, Lat. N. 79° 49’. 
Localities: The Norwegian Polar Sea: Nordlanden according to specimens in KLEEN’s 
herbarium; not recorded from here in Nordl. Alg. 
The Greenland Sea: at two places on the north-west and west coast of Spitzbergen, 
local and scarce. 
The Murman Sea: at N. Gusinnoi Cape on the west coast of Novaya Zemlya, rare. 
The White Sea: Solowetzki Isles, probably scarce. 
Phloeospora tortilis (Rupr.) Aruscu. 
Bot. Not. 1876, p. 34. Scytosiphon tortilis Rupr. Alg. Och. p. 373. 
Descr. Phloeospora tortilis ARgscn. 1. ¢. 
Fig. Dictyosiphon tortilis Gopi, Brauntange t. 2, fig. 12—16. 
Phloeospora tortilis KjELuM. Spets. Thall. 2, t. 1, fig. 21. 
Ezsice. » »  ArescH. Alg. Scand. Exsicc. N:o 413. 
Syn. Dictyosiphon spec. Ksetum. Vinteralgv. p. 65. 
Phloeospora Lofotensis Fosiiz, Arct. Havalg. p. 8. 
» tortilis Gopi, Algenfl. Weiss. Meer. p. 64. 
» » KyeLLM. Spetsb. Thall. 2, p. 40; Algenv. Murm. Meer. p. 45; Kariska hafvets 
algv. p. 29. 
Habitat. This species grows in salt or brackish water, sometimes of very slight 
salinity, within the litoral or sublitoral zone, always at little depth (2—45 fathoms). It 
flourishes both on exposed and sheltered coasts. When young, it is attached to stones, 
but later it occurs in greater or less masses of indefinite shape lying loose on the bottom. 
It is somewhat gregarious and is occasionally found in such numbers as to influence 
essentially the character of the vegetation. In the Arctic Sea it increases vigorously 
in a vegatative manner by branches and branchsystems being detached and individualized. 
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