KONGL. SV. VET. AKADEMIENS HANDLINGAK. 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. Agakdh »bases pinnarum quasi margiiie 

 tenuiore conjunguntur», but it does not at all resemble A. esculenta f. muscufolia, iu 

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

 canaliculo impresso egredientess (cp. J. G. Ag. Gronl. Lam. och Fuc. p. 25). 



Habitat. This species sometimes 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 numbers 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 Bafl&n Bay. 1 cannot 

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

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

 N. 71°. 



Localities: The Norwegian Polar Sea: Nordlanden according to Kleen; Tromso 

 amt near the town of Tromso, local and scarce; Finmarken at Maaso, local, but rather 

 plentiful. 



Baffin Bay: the west coast of Greenland at Julianeshaab, Sukkertoppen, Jakobs- 

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



Alaria membranacea J. G. Ag. 

 Gronl. Lam. och Fuc. p. 26. 

 Descr. Alaria membranacea J. G. Ag. 1. c. 



Syn. Alaria esculenta Dickie, Alg. Sutherl. 1, p. 140 (?). 



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



» » Nyl. et 8*1. Herb. Fenn. p. 73(?). 



» « Post, et Rupe. 111. Alg. p. II. Cfr. Gobi, 1. c. p. 78. 



» mussefolia Kjbllm. Algenv. Murm. Meer. p. 35. 



I) Pylaii J. G. Ag. Spetsb. Alg. Till. p. 28 et 30; Gronl. Alg. p. 110. Cfr. Gronl. Lam. och 

 Fuc. p. 24 et 26. 

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



Remark on the species. In the collections of Alariw which I have brought home 

 from the coast of Finmarken in Norway, there are several young specimens that agree 

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

 A. membranacea. They belong undoubtedly to another series of forms 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 



