KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 20. N:0 5. 179 



Geogr. Distrib. Found only in the southern part of the Polar Sea on the north- 

 west coast of Norway. 



Locality: The Norwegian Polar Sea: Nordlanden, scarce. 



Gen. Antithamnion (Nag.) Thuk. 



in Le Jol. Liste Alg. Clierb. p. Ill; NjsG. N. Algensyst. p. 200; char. raut. 



Antithamnion floccosutn (Mull.) Kleen. 



Nordl. Alg. p. 21. Conferva floccosa Mull. El. Dan. t. 828, fig. 1. 



f. atlantica J. G. Ag. 



Descr. Callithamnion floccosum var. a atlanticum J. G. Ac. Epicr. p. 22. 

 Fig. » » Harv. Phyc. Brit. t. 81. 



ExsicG. » » HoHENACK. Alg. Mar. N;o 325. 



Syn. Antithamnion floccosum Kleen, 1. c. 



Habitat. The present plant has been found in the Polar Sea both litoral, growing 

 in rock-pools, and sublitoral, in the lowest part of this zone, being attached here to 

 Lithothamnia. On the coasts of Europe only a few sterile individuals have ever 

 been found. 



Geogr. Distrib. Known from the Norwegian Polar Sea and, according to J. G. 

 Agahdh, from the sea off Greeidand. The northernmost known locality of this species 

 is Maaso on the north coast of Norway, about Lat. N. 71°. 



Localities: The Norwegian Polar Sea: Nordlanden, local, very scarce; Finmarken 

 exceedingly rare at MaasO. 



Baffin Bay: Cp. J. Ag. Epicr. p. 22 in the note under the species in question. 



Antithamnion Pylaissei (Mont.) nob. 



Callithamnion Pylaissei Mont. PI. Cell. N:o 11, sec. J. G. Ag. Epicr. p. 22. 



Descr. Callithamnion Pylaissei Harv. Ner. Am. 2, p. 239. 

 Fig. » » " » » t. 36 B. 



» » » KiJTZ. Tab. Phyc. 11, t. 90. 



f. norvegica nob. 



Planta minuta, vix semipollicaris, articulis mediis axis primarii et ramorura quam in forma typica bre 

 vioribus, diametro vix 4-plo longioribus. Tab. 16, fig. 1. 



Remark on the form norvegica. If one compares the above-quoted figures in 

 Harvey and Kutzing with figure 1 in tab. 16 in the present work, representing an 

 alga from the north coast of Norway, one cannot well doubt but that the plant called 

 C. Pylaiscei exists on the coast of Scandinavia, though in a somewhat different form. 

 I have seen the same form also in collections from Greenland. The form from the 

 high North differs from the American by its smaller size and by its growing scattered. 



