264 KJELLMAN, THE ALG^ OF THE ARCTIC SEA. 



Gen. PMoeospora Aresch. 

 Bot. Not. 1873, p. 163. 



Phloeospora subarticnlata Aresch. 

 1. c. p. 164. 



Descr. Phloeospora subarticulata Aresch. Bot. Not. 1676, p. 33. 



Easicc. Dictyosiphon foeniculaceus var. subarticulatus Aresch. Alg. Scand. exsicc. N:o 104. 

 Syn. Phloeospora subarticulata Gobi, Algenfl. Weiss. Meev. p. 64. 



» » Kjellm. 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 Zeralya, rare. 



The White Sea: Solowetzki Isles, probably scarce. 



Phloeospora tortilis (Rupr.) Aresch. 

 Bot. Not. 1876, p. 34. Scytosiphon tortilis Rupr. Alg. Och. p. 373. 

 Descr. Phloeospora tortilis Aresch. 1. c. 



Fig. Dictyosiphon tortilis Gobi, Brauntange t. 2, fig. 12 — 16. 



Phloeospora tortilis Kjellm. Spets. Thall. 2, t. 1, fig. 21. 

 Exsicc. " » Aresch. Alg. Scand. Exsicc. N:o 413. 



Syn. Dictyosiphon spec. Kjellm. Vinteralgy. p. 65. 



Phloeospora Lofotensis Foslie, Arct. Havalg. p. 8. 



» tortilis Gobi, Algenfl. Weiss. Meer. p. 64. 



» » Kjellm. 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 — 5 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. 



