266 KJELLilAN, THE ALGiE OF THE ARCTIC SEA. 



is delineated in tab. 1, iig. 16 in Algenv. Murm. ]\Ieer. The rhizoids are usually un- 

 branched, cylindrical, more or less curved, monosiphonic, but sometimes polysiphonic, 

 and in this case club-shaped with the upper joints almost spherical; tab. 26, fig. 17. 



I have not yet found any decisive reason to abandon my opinion that Phi. 

 pumila is another species than Phi. tortilis although only feebly distinguished from it. 

 My not having found it with zoosporangia is a matter of no consequence with regard 

 to its claim to be considered a separate species, because such organs may either be 

 developed at another season than when I happened to meet with this plant or replaced 

 perhaps by vegetative propagation in the manner observed in this species. On a re- 

 newed examination of the specimens once collected I have failed to detect any hairs. 



Habitat. This alga belongs to those few species which are litoral within the 

 Arctic Sea proper. It has been found growing in sheltered places in rock-pools with 

 sandy bottom below low-water mark, forming sometimes scattered tufts, sometimes 

 mats of rather considerable extent. Specimens with zoosporangia as yet unknown. 



Geogr. Distrib. Known as yet only from the eastern part of the Murman Sea. 



Localities: The J/urman Sea: Matotshin Shar to Besimannaja Bay on the west coast 

 of Novaya Zemlya. 



Gen. Coilonema Aresch. 



Alg-. Scand. exsicc. N;o 323. 



Coilonema Ekraani Aresch. 

 Obs. Phyc. 3, p. 33. 

 Descr. Dictyosiphon (Coilonema) Ekmani 1. c. 



Spi. Lithosiphon Lomentariae Klekn, Nordl. Alg. p. 40. 



Habitat. This species is a litoral alga, attached to Scytosiphon lomentarius. Spe- 

 cimens taken at the end of June on the north-west coast of Norway are profusely 

 furnished with mature zoosporangia. 



Geogr. Distrib. Known only from the most southern part of the Polar Sea. 



Locality/: The Norwegian Polar Sea: Bodo in Nordlanden. 



Coilonema chordaria Aresch. 



f. bahusiensis Aresch. 



Bot. Not. 1873, p. 170. 

 Descr. Dictyosiphon (Coilonema) chordaria Aresch. Obs. Phyc. 3, p. 32. 

 Fig. « chordaria Aeesch. Phyc. Scand. t. 8, B. 



Syn. Dictyosiphon (Coilonema) Finmarkicum Foslie, Arct. Havalg. p. 6. 



Habitat. A litoral alga usually occurring in rock-pools and attached to stones. It is 

 to be met with on exposed as well as sheltered coasts. In exposed localities it grows 

 larger and more luxuriant. I have collected specimens at Gjesvger in Finmarken of the 



