K0N6L. SV. VKT. AKADEMIENS HANDLINGAE. BANt) 20. N:0 5. 65 



of the Murman Sea and the White Sea, as well as in the Norwegian Polar Sea. The 

 Flora of the two former seas, as has been demonstrated by Gobi's detailed and accurate 

 description of it, is a mixed Flora, composed of elements from the Atlantic as well as 

 the Arctic Sea. Among these elements the following species are probably to be reckoned: 

 Corallina officinalis, Mesogloia vermicularis, 



Lithophyllum Lenormandi, Isthmoplea sphaerophora, 



Laminaria saccharina, Bulbocoleon piliferum. 



Eudesme virescens, 



The same category includes probably several species which are known, besides 

 from the Norwegian Polar Sea, also from Baffin Bay on the west coast of Greenland 

 or from here as well as from the White Sea and the western Murman Sea. Such are: 



Polysiphonia urceolata, Scytosiphon lomentarius, 



» nigrescens, Cladostephus spongiosus, 



Peyssonnelia Dubyi, Sphacelaria cirrhosa, 



Cruoria pellita, » olivacea, 



Hydrolapathum sanguineum, Enteromorpha clathrata, 



Dumontia filiformis? « intestinalis, 



Cystoclonium purpurascens, Monostroma Grevillei, 



Gigartina mamillosa, Cladophora gracilis, 



Rhodochorton sparsum, Chaetomorpha tortuosa? 



Porphyra laciniata, Bryopsis plumosa, 



Pelvetia canaliculata, Rivularia hemisphajrica. 

 Myrioneraa strangulans. 



It appears probable also that some species which occur on the coast of Norway, 

 and at the same time are more widely distributed in the Arctic Sea, ought also to be 

 regarded as immigrated from the south, viz.: 



Polysiphonia fastigiata, Fucus vesiculosus? 



» atrorubescens, » serratus, 



Sarcophyllis edulis, Spongomorpha lanosa, 



Ozothallia nodosa, Cladophora rupestris. 



Lastly, there are to be mentioned here several species which probably, like some 

 of those peculiar to the Norwegian Polar Sea, neither have immigrated into the Polar 

 Sea, because they do not occur farther to the south or else have a very slight 

 southerly distribution, nor can be regarded as old glacial species, on account of their 

 present distribution within the Arctic Sea. To this class the following species seem 

 to belong: 



Phyllophora Brodiaei, Fucus linearis, 



Antithamnion floccosum, » filiformis, 



» Pylaissei, » distichus, 



Fucus edentatus, Alaria Pylaii. 



» miclonensis, 



K. Vet. Akad. Handl. B. 20. N:o 5. 



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