192 KJELLMAN, THE ALGA OF THE ARCTIC SEA. 
The lower part of the frond is composed of club-shaped cells. The tips of these 
cells imbedded in gelatine form the callus radicalis. The rest of the frond consists of 
cells that are rectangular in transverse section with the corners of the cell-rooms pretty 
much rounded. Sporocarps and antheridia are produced in different individuals and 
take up an irregular zone in the margin of the frond, broader than in P. laciniata. 
The sporocarps have few spores (tab. 18, fig. 10 and 11). 
Habitat. As far as my experience goes, this species belongs to the deeper parts 
of the sublitoral region, on exposed coasts, growing scattered, attached to other alge 
or Hydromedusw. It has been found in deep water also by Kiren. Specimens with 
antheridia have been taken at Nordlanden in July, with sporocarps in development at Fin- 
marken in the beginning of August. Individuals from Greenland, collected at the end 
of September or beginning of October, possess antheridia and sporocarps. 
Geogr. Distrib. I cannot decide where the centrum of distribution of this 
species is to be placed. It is not commonly spread in the Arctic Sea. The greatest 
number of individuals appears to have been met with on the coast of Russian Lapland. 
The most northern locality is Gjesver on the north coast of Norway, Lat. N. 71° 5’. 
Localities: The Norwegian Polar Sea: Nordlanden rare; Finmarken rare at Maasé 
and Gjesveer. 
The Murman Sea: the coast of Russian Lapland, a great number of specimens 
collected. 
The White Sea: probably scarce. 
Bafjin Bay: the west coast of Greenland at Sukkertoppen. 
Gen. Bangia (Lynas.) Koirz. 
Phyc. gener. p. 248; Lynes. Hydr. Dan. p. 82; lim. mut. 
3Jangia fuscopurpurea (Dimiw.) Lynas. 
l. ce. p. 83. Conferva fuscopurpurea Diniw. Brit. Conf. p. 92. 
Descr. Bangia fuscopurpurea Hauck, Meeresalg. p. 22. 
Fig. » » Kurz. Tab. Phyc. 3, t. 29. 
Exsice. » » Anrgscu. Alg. Scand. exsice. N:o 118. 
Syn. Bangia arctica Fostim, Arct. Havalg. p. 5. . Cfr. Hauck, |. ec. et Brerru. Bangiaceen, p. 23. 
» fuscopurpurea Kneen, Nordl. Alg. p. 24. 
» » Croat, F]. Disc. p. 461. 
Conferva atropurpurea We. FI. Lapp. p. 515. 
Habitat. It is litoral, growing between tide-marks either in rock-pools or on 
stones. I do not know at what time it bears propagative organs in the Arctic Sea. 
Geogr. Distrib. The species is known with certainty from the Norwegian Polar 
Sea. It has been met with also in Baffin Bay; but not being attached, its occurrence 
here is uncertain. Its northernmost known locality is North Cape on the north coast 
of Norway. 
