KONGL. SV. VET. AKADEMIENS HANDLINGAK. BAND, 20. N:0 5. 317 



Syn. Bryopsis plumosa Ashm. Alg. Hayes, p. 96. 

 » » Croall. F1. Disc. p. 460. 



» » Klken, Nordl. Alg. p. 40. 



Habitat. On the north coast of Norway it grew in rock-pools in the literal zone, 

 scattered, attached to stones or Lithothamnion polymorphum. The Norwegian specimens 

 collected in July and August are sterile and very feebly developed. 



Geogr. Distrib. Known from the Norwegian Polar Sea and Baffin Bay. In the 

 latter region it goes far northwards, being reported by Ashmead from Smith Sound 

 between Lat. N. 78° and 82°. 



Localities: The Norwegian Polar Sea: Nordlanden, rather. rare at Fleinvser and 

 Rost. 



Baffin Bay: The west coast of Greenland, exact locality unrecorded; Smith Sound. 



Fam. CHARACIACEyE (Nag.) Witte. 



Gotl. och 01. Alg. p. 32; N^g, Gatt. einz. Alg. p. 64, excl. gen. 



Gen, Characium Al. Bkaun. 



in KtJTZ. Spec. Alg. p. 208. 



Characium Marinum nob. 



Descr. et Fig. Characium spec. Kjellm. Spetsb. Thall. 2, p. 57 et t. 4, fig. 10. 



Habitat. Of this alga, for which I think fit now to propose a special name, I 

 have found only one individual. This was attached to Pylaiella litoralis and furnished 

 with ripe zoospores, when taken in the month of October. 



Locality: The Greenland Sea: Musselbay on the north coast of Spitzbergen. 



Gen. Oodiolum Al. Bkaun. 



Alg. unic. p. 19. 



Codiolum Longipes Foslie. 



Arct. Havalg. p. 11. 

 Descr. et Fig. Codiolum longipes Foslie 1. c. et t. 2, fig. 4. 

 Ewsioc. » » » in Wittr. et Nordst. Alg. exsicc. N:o 458. 



Addition to the description of the species. The stipe does not always pass into the 

 club-head so without a limit, as appears in the figures of Foslie. Among the speci- 

 mens kindly communicated to me by Foslie there are several that accord nearly with 

 C. gregarium Al. Braun in regard to the shape of the club-head. I think I ought to 

 point out this fact, because it shows that C. longipes is a species very slightly diffe- 

 rentiated from C. gregarium. 



