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



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

 west coast of Norway. 



Locality: The Norwegian Polar Sea: Nordlanden, scarce. 



Gen. Antithamnion (Näg.) Thuk. 



in Le Jol. Liste Alg. Clierb. p. 111; N^g. N. Algensyst. p. 200; char. raut. 



Antithamnion floccosum (Mull.) Kleen. 



Nordl. Alg. p. 21. Conferva floccosa Mull. Fl. Daii. t. 828, lig. 1. 



f. atlantica J. G. Ag. 

 Descr. Callithamiiion ttoccosum var. a atlaintioum J. G. Ag. Epicr. p. 22. 

 Fig. » » Harv. Phyc. Brit. t. 81. 



Exsicc. « » 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 hare to 

 Litlwthamnia. On the eoasts of Europé only a few sterile individuals have ever 

 been found. 



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

 Agakdh, from the sea off Greenland. The northernmost known locality of this species 

 is Maasö on the north coast of Norway, about Lat. N. 7I°- 



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

 exceedingly rare at Maasö. 



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



Antithamnion Pylaisaji (Mont.) nob. 



Callitharanion Pylaissei Mont. Pl. Cell. N;o 11, sec. J. G. Ag. Epicr. p. 22. 



Descr. Callithamnion Pylaisaei 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 ramorum quam in rorma typica bre 

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



Remark on the form norvegica. If one compares the above-quoted iigures 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 iu 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, 



