266 KJELLMAN, THE ALG@ OF THE ARCTIC SEA. 
is delineated in tab. 1, fig. 16 in Algenv. Murm. Meer. 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 PAl. 
pumila is another species than Phl. 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 Murman Sea: Matotshin Shar to Besimannaja Bay on the west coast 
of Novaya Zemlya. 
Gen. Coilonema ARESCH. 
Alg. Scand. exsice. N:o 323. 
Coilonema Ekmani AREscH. 
Obs. Phyc. 3, p. 33. 
Deser. Dictyosiphon (Coilonema) Ekmani 1. c.: 
Syn. Lithosiphon Lomentariz Kieen, Nord]. 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 Argescu. Obs. Phyc. 3, p. 32. 
Fig. » chordaria ArgescH. Phyc. Scand. t. 8, B. 
Syn. Dictyosiphon (Coilonema) Finmarkicum Fostin, 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 Gjesver in Finmarken of the 
