KONGL. SV. VET. AKADEMIENS IIANDLINGAK. BAND. 20. N:0 5. 215 



a dried ^ specimen, it represents in this point pretty accurately A. Pylaii, in which 

 according to the quite correct account of J. G. Agardh »bases pinnarum quasi niarginu 

 tenuiore conjunguntur», but it does not at all resemble A. esculenta f. muscefolia, in 

 which 1 as well as J. G. Agardh have always found the sporophylls (pinnpe) »quasi e 

 oanaliculo impresso egredientes» (cp. J. G. Ag. Grönl. Lam. och Fuc. p. 25). 



Hahitat. This species sometiraes occurs in rock-pools in the litoral zone, being 

 then more or less dwarfed with very broad sporophylls. But on the coast of Norway 

 it is generally found at or somewhat below low-water mark, between the litoral and 

 the sublitoral region. It is gregarious as the preceding species, but does not grow in 

 any very great nurabers together. Specimens taken on the coast of Norway in July 

 and August bear ripe zoosporangia. The individuals brought home from Greenland by 

 Swedish expeditions, most of which seen by me are provided with zoosporangia, appear 

 to have been collected in July, August, and September. 



Geogr. Distrih. Known from the Norwegian Polar Sea and BafRn Bay. I cannot 

 decide where it attains its maximum of frequency. The most northern point whero it 

 is known with certainty to occur is Maasö on the north coast of Norway about Lat. 

 N. 71°. 



Localities; The Norioegian Polar Sea: Nordlanden according to Klken; Troinsö 

 amt near the town of Troinsö, local and scarce; Finmarken at Maasö, local, but rather 

 plentiful. 



Baffn Bay: the west coast of Greenland at Jidianeshaab, Sukkertoppen, Jakobs- 

 havn, Claushavn, probably rather abundant. Cp. J. G. Ag., 1. c. p. 20 — 21. 



Alaria membranacea J. G. Ag. 

 Grönl. Lam. och Piic. p. 26. 

 Descr. Alaria raembranacea .T. G. Ag. 1. c. 



Syn. Alaria osculeiita Dickie, Ala;. Siitlierl. 1, p. 140(?). 



« » Kleen, Nordl. Alg. p. 32; ex parte, fide syn. 



Nyl. et, Scxl. Hcrh. Fenn. p. 7.3(?). 

 » » Post. el Rupr. 111. Alg. p. II. Cfr. Gobt, 1. o. p. 78. 



M musasfolia Kjellm. Algenv. Miirm. Meer. p. 3.5. 



» Pylaii J, G. Ag. Spetsb. Alg. Till. p. 28 et 30; Grönl. Alg. p. IIU. Cfr. Grönl. Lam och 

 Puc. p. 24 et 26. 

 Orgyia pinnata Gobi, Algcnfl. Weiss. Meer. p. 77. 



Remark on the species. In the coUections of Alaria' which I have brought home 

 from the coast of Finmarken in Norway, there are sevoral young speeimens that agree 

 very closely with the Greenland alga distributed by J. G. Agardii under the name of 

 A. memhra.nacea. They belong undoubtedly to another series of forras than A. escu- 

 lenta. But they come very near A. Pylaii on the one side, A. grandifolia on the other, 

 and might be considered as an intermediate form between these two species or as a 

 more southern form of A. grandifolia. However, the plant occurring in an almost 

 identical form at two places so widely distant as the coast of Finmarken in Norway 



