282 KJELLMAN, THE AX.GM OF THE ARCTIC SEA. 



On the north coast of Norway it has been found with zoosporangia and gametangia 

 from July to September; on the coast of Spitzbergen I have seen specimens with re- 

 productive organs in all the months of the year with the exception of May and Oc- 

 tober. They were however rare during the winter. On the west coast of Novaya 

 Zemlya I have collected individuals with such organs in July, in the Kara Sea in July 

 and August. 



Geogr. Distrib. The present species is probably circumpolar. It is however not 

 known as yet from the American Arctic Sea. The maximum of frequency is in the 

 Norwegian Polar Sea. The most northerly point is Low Island on the north coast of 

 Spitzbergen Lat. N. 80° 20'. 



Localities: The Norwegian Polar Sea: Nordlanden common and abundant; Tromso 

 amt common and abundant about the town of TromsO, at Reno and Carlso; Finmarken 

 common and abundant at Maaso, Gjesvaer, the south coast of MagerO, Oxford, and 

 Talvik. 



The Greenland Sea : the east coast of Greenland at Sabine Island ; on the coasts of 

 Spitzbergen common, but not abundant; Beeren Eiland. 



The Murman Sea: the coast of Russian Lapland and Cisuralian Samoyede-land; 

 the west coast of Novaya Zemlya and Waygats rather common but not abundant. 



The White Sea: common and abundant. 



The Kara Sea: Uddebay rather abundant; Actinia Bay and Cape Tshelyuskin scarce. 



The Siberian Sea: at Pitlekay rather abundant. 



Baffin Bay: Cumberland Sound common; the west coast of Greenland: Tessar- 

 miut, Nanortalik, Lichtenau, Kakortok, Fiskernaes, Hunde Islands, Lat. N. 73° (floating)- 



Pylaiella varia nob. 



P. thallo racemose-ramoso; ramis sub angulo fere recto egredieDtibus duplicis generis, longioribus et bre- 

 vissimis; his a singula bis denis cellulis eonstructis, omnibus vel saltern nonnulis, vulgo divisione vario mode 

 peracta, in zoosporangia vario modo disposita mutatis. Tab. 27, fig. 1 — 12. 

 Syn. Ectocarpus Landsburgii Dickie, Alg. Sutherl. 1, p. 142. 

 » Vidovichii Wittk. in Heugl. Reise, 3, p. 284. 



Pylaiella litoralis Kjellm. Spetsb. Thall. 2, p. 36; ex parte. 



Description. In the collections af algas brought home by Hexjglin from the coast 

 of Spitzbergen there was found a peculiar Ectocarpacea, which was determined as Ec- 

 tocarpm Vidovichii. Having myself met with the same alga on the coast of Spitzbergen, 

 I found that it belonged to the genus Pylaiella. I held it to be an abnormally deve- 

 loped form of the multiform P. litoralis. Both the specimens of Heuglin and those 

 collected by myself were in a stage of development that prevented their being certainly 

 determined. I have later found numerous, fully developed individuals of the same alga 

 on the north coast of Norway. These differ so much in many respects from the common 

 forms of Pylaiella that I cannot but hold them to belong to another species. I propose to 

 give this new species the name of varia, by which I mean to denote the great variations ex- 

 hibited in the development of the zoosporangia. The alga forms loosely complicated mats 



