KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 20. N:0 5. 265 



On the north coast of Spitzbergen this kind of propagation vvas especially lively during 

 the winter. The plant also develops zoospores here in the same season; however, such 

 organs are chiefly produced during the latter part of the suinmer, August and Sep- 

 tember. FosLiE has collected speciniens with zoosporangia at the end of September at 

 Nordlanden. 



Geogr. Distrib. The present species is probably circumpolar. However, it has 

 not been observed as yet in the Siberian and American Arctic Seas. The maximum of 

 frequency is on the coasts of Spitzbergen. The most northern point where it has been 

 found is Musselbay on the north coast of Spitzbergen Lat. N. 79° 53'. 



Localities: The Norwegian Polar Sea: Nordlanden; Lofoden abundant; Finmarken 

 at Talvik local and scarce. 



The Greenland Sea: comraon and abundant on the north and west coasts of Spitz- 

 bergen. 



The Murman Sea: the west coast of Novaya Zemlya, Jugor Shar, local and scarce. 



The White Sea: Solowetski Isles. 



The Kära Sea: Uddebay scarce; Cape Palander rather abundant; Actinia Bay 

 scarce. 



Bafjin Bay: the west coast of Greenland: Neuherrnhut. 



Phloeospora pumila Kjellm. 



Algenv. Murm. Meer. p. 45. 

 Descr. Phloeospora pumila Kjellm. 1. c. 

 Fiff. » » " t. 1, fig. 16—22. ' 



Remark on the species. In my description of this species I have expressly stated 

 that I could not determine with certainty how far it is related to Phl. tortilis, whether 

 it is to be regarded as a distinct species or as a dwarfed form of the latter alga pro- 

 duced by external conditions. I have not since that time acquired any new facts for 

 deciding this question. But in the mean time GoBi has brought forward a remarkable 

 view with regard to the present alga. He believes he has found that it is »nichts weiter 

 als vegetative Sprosse der Phl. tortilis» (Gobi, x\lgenfl. Weiss. Meer. p. 65). When I 

 desci'ibed Phl. puinila, I was perfectly well acquainted with the peculiar manner of 

 vegetative propagation in Phl. tortilis, having given a detailed account of it in Spetsb. 

 Thall. 2, p. 41. I am quite willing to admit that the axes and systems of axes that 

 detach themselves from older individuals of Plil. tortilis and then develop independently, 

 are very similar to Phl. pumila. But Gobi, in identifying these formations with Phl. 

 pumila, has overlooked my express statement that Phl. pumila forms distinct tufts or 

 small mats and that these are attached to a substratum by unmistakable rhizoids. I have 

 seen plenty of such formations as are mentioned by Gobi, but I have always found 

 them more or less firmly united or entangled to indetinite masses lying loose on the 

 bottom, never composing distinct tufts or mats, covering or fastened to a substratum, 

 as in the case in Phl. pumila. In this alga a considerable number of rhizoids combined 

 into a cushion-shaped plexus issue from the lower part of the frond. Such a plexus 



K. Vet. Akad. HandL Bd 20. N:o 5. O 4 



