KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 20. N:0 5. C27 
The other locality in Baffin 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 Norwegian 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, Koleujew 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 fraginent 
of the species »e Groenlandiay without no defined locality being stated. 
Fam. SPONGIOCARPEZ (Grev.) 
sec. J. G. Ac. Epigr. Alg. p. 628 
Gen. Polyides Ac. 
Spec. Alg. 1, p. 390. 
Polyides rotundus (Gmet.) Grev. 
Alg. Brit. p. 70, sec. J. G. Aa. Spec. Alg. 2, p. 721. Fucus rotundus Gmeu. Hist. Fue. p. 110 
f. typica. 
Descr.  Polyides lumbricalis J. G. Ac. Spec. Alg. 2, p. 721. 
Fig. » rotundus Harv. Phye. Brit. t. 95. 
Exsice. » » Aresco. Alg. Scand. exsice. N:o 252. 
Syn. Polyides lumbricalis Kieren, Nordl. Alg. p. 15. 
» rotundus Gopi, Algenfl. Weiss. Meer. p. 32. 
» Nyl. et Sel. Herb. Fenn. p. 74. 
f. fastigiata ‘TURN. 
Hist. Huc..1, p. 9. 
Descr. Fucus rotundus y fastigiatus Turn. lL. ec. 
Syn. Polyides rotundus Kye.um. Algeny. Murm. Meer. p. 14. 
Remark on the determination of the species. In my paper on the alew 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 rotundus. 1 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 Murcellaria fastigiata. These tetrasporangia 
prove distinctly that the plant is a Polyides. 
Halitat. 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. Kriern has found 
