KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 20. N:0 5. 127 



The other locality in Baffiii Bay from which it is reported, Hunde Islands, is situate 

 at about the same latitude as Russian Lapland and moreover is not quite certain. 



Localities: The Norioegian Polar Sea: Nordlanden commonly spread, but scanty; 

 Finmarken »frequenter» according to Wahlenberg; I have not myself been able to find 

 it on this coast. 



The Murman Sea: the coast of Russian Lapland, the western part of the coast 

 of Cisuralian Samoyede-land, Kolgnjew Island. 



The White Sea, common and plentiful. 



Baffin Bay: the west coast of Greenland, Hunde Islands (?), Whale sound, washed 

 ashore. In the collections of the Copenhagen Museum I have seen a small fragment 

 of the species »e Groenlandia» without no defined locality being stated. 



Fam. SPONGIOCARPE.E (Grev.) 



seo. ,T. G. Ag. EpigT. Alg. p. 628. 



Gen. Polyides Ag. 



Spec. Alg. 1, p. 390. 



Polyides rotundus (Gmel.) Grev. 



Alg. Brit. p. 70, sec. J. G. Ag. Spec. Alg. 2, p. 721. Pucus rotundus Gmel. Hist. Puc. p. 110. 



f. typica. 

 Descr. Polyides lumbriealis J. G. Ag. Spec. Alg. 2, p. 721. 

 Fig. » rotundus Hakv. Phyc. Brit. t. 95. 



Exsioc. » a Akescii. Alg. Scaud. exsicc. N:o 252. 



Si/7i. Polyides lumbriealis Kleen, Nordl. Alg. p. 15. 



» rotundus GoBi, Algenfl. Weiss. Meer. p. 32. 

 » Nyl. et Ssel. Herb. Penn. p. 74. 



f. fastigiata Turn. 



Hist. Puc. 1, p. 9. 

 Descr. Pucus rotundus y fastigiatus Turn. 1. o. 



Syn. Polyides rotundus Kjellm. Algenv. Murm. Meer. p. 14. 



Remark on the determination of the species. In my paper on the algaa of the Mur- 

 man Sea, I referred an alga taken at Matotshin Shar and at Besimannaja Bay on the 

 east coast of Novaya Zemlya to Polyides rotund,us. I have subjected this alga to a 

 renewed examination and succeeded in finding tetrasporangia in some of those speci- 

 mens which were most similar in habit to Furcellaria fastigiata. These tetrasporangia 

 prove distinctly that the plant is a Polyides. 



Habitat. On the coast of the Norwegian Polar Sea this alga is litoral, occurring 

 on exposed shores, chiefly in rock-pools between tide-marks. On the west coast of 

 Novaya Zemlya it is sublitoral. Here as elsewhere it grows scattered. Kleen has found 



