138 KJELLMAN, THE ALGJ5 OF THE ARCTIC SEA. 



during the months of November, December, January, February and March. Individuals 

 with sporocarps were found most numerous in February, March, April and May. Older 

 specimens with sporocarps have been met with in great number also in August on the 

 coast of Spitzbergen. The development of tetraspores seems here to reach its maximum 

 in November and December, and it was most probably in tetraspores from this season 

 that the young individuals occurring during the latter part of the winter had their 

 origin. However, tetrasporiferous individuals are found here also in summer, in June, 

 August, and September. Kleen appears to have met with only sterile specimens at 

 Nordlanden. I have collected tetrasporiferous individuals on the coast of Finmarken 

 in September, in the Siberian Sea in August, and specimens with tetrasporangia and 

 sporocarps in the eastern part of the Murraan Sea in the months of June and July. 

 It would thus seem that this alga bears propagative organs of some kind or other all 

 the year round. With regard to the present species on the coast of Scandinavia 

 Areschoug says 1. c. »Martii et Aprilis mensibus fructificans», to which may be added 

 that on the coast of Bohuslan I have found individuals with sporocarps and tetraspo- 

 rangia at the end of December and plants in germination at the beginning of January. 



Geogr. Distrib. This species occurs both in the Atlantic and the arctic region of the 

 Polar Sea, being widely distributed in both. It appears to have its maximum of fre- 

 quency in those parts of the Arctic Sea which extend to the west of the Atlantic. Its 

 northernmost known locality is the North Cape of Spitzbergen Lat. N. 80° 31'. 



Localities: The Norwegian Polar Sea: Nordlanden, very common and plentiful; 

 Finmarken, common, but not very abundant, as at Maaso, Gjesvo3r, the south coast of 

 MagerO, Oxfjord, and Talvik. 



The Greenland Sea: the north and west coasts of Spitzbergen, common and abun- 

 dant; the eastern coast of Greenland at several places. 



The Murman Sea: on the coasts of Russian Lapland and Cisuralian Samoyede- 

 land, Kolgujew Isle, the west coast of Novaya Zemlya and Waygats, from Matotshin 

 Shar to Jugor Shar, common and abundant. 



The White Sea: common and abundant. 



The Kara Sea: Uddebay, Actinia Bay, scanty; Kara Bay. 



The Siberian Sea: Cape Jakan and the mouth of Koljutshin Bay, pretty common, 

 but not abundant. 



The American Arctic Sea: the north coast of Western Eskimaux-land. 



Baffin Bay: the west coast of Greenland at Godhavri and Dark Head. Here the 

 species appears to be scarce. 



Of the forms mentioned, f. typica is the most common and abundant. Neverthe- 

 less it does not, as far as I know, occur in the Siberian Sea, being supplied here by 

 f. lingulata, which is known, besides, from the east coast of Greenland, the north and 

 west coasts of Siberia, the west coast of Novaya Zemlya and Waygats, and the Norwe- 

 gian Polar Sea. Forms approaching most nearly to f. quercifolia I have seen on the 

 west coast of Spitzbergen and of Novaya Zemlya. Wahlenberg reports this form from 

 Nordlanden. 



