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



On the north coast of Spitzbergen this kind of propagation was 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 summer, August and Sep- 

 tember. FosLiE has collected specimens 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: common 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 Kara Sea: Uddebay scarce; Cape Palander rather abundant; Actinia Bay 

 scarce. 



Baffin Bay: the west coast of Greenland: Neuherrnhut. 



Phloeospora pumila Kjellm. 



Algenv. Murm. Meer. p. 45. 

 Descr. Phloeospora pumila Kjellm. 1. c. 

 Fig. » » » t. 1, lig. 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 Phi. 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 welter 

 als vegetative Sprosse der Phi. tortilis« (Gobi, Algenfl. Weiss. Meer. p. 65). When I 

 described Phi. pumila, I was perfectly well acquainted with the peculiar manner of 

 vegetative propagation in Phi. 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 Phi. tortilis and then develop independently, 

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

 pumila, has overlooked my express statement that Phi. 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 indefinite masses lying loose on the 

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

 as in the case in Phi. 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. Hanrtl. Btl 20. N:o 5. o4 



