KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 20. N:0 5. 207 



the preserving, retains its dark-brown colour at least in the upper segments. F. mi- 

 clonensis comes more near F. linearis, from which it is scarcely to be distinguished 

 except by the different shape of the upper segments. It also approaches F. edentatus 

 f. contracta, as Kleen has rightly noticed, biit may be recognized from it by means 

 of the characteristics given by Kleen ; Nordl. Alg. p. 29 note. 



Habitat. It grows scattered in rock-pools in the litoral zone. I have met with 

 it only at exposed localities. The proper season of fructification on the north coast 

 of Norway is at the end of July and the beginning of August. However it is to be 

 found with ripe receptacles even in September. 



Geogr. Distrib. Known only from the Norwegian Polar Sea, where it is local and 

 not abundant. The northernmost locality is Maasö, about Lat. N. 71°. 



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

 scarce at Maasö. 



Fucus linearis Fl. Dan. 

 t. 351. 



Descr. Fucus linearis J. G. Ag. Spetsb. Alg. Till. p. 39. 

 Fig. » » Fl. Dan. 1. e. 



Syn. Fucus distioluis Gom, Algenfl. Weiss. Meev. p. 52; ex parte. 



» » Kleen, Nordl. Alg. p. 30; ex parte? 



» linearis J. G. Ag. Enum.; Grönl. Alg. p. 110; Grönl. Lam. och Fuc. p. 29. 



Remark on the species. The plant delineated in Fl. Dan. 1. c. under the name of 

 F. linearis is no doubt so well-marked a form as to deserve to be registered as a se- 

 parate species. In general it is to be known without difficulty from the cognate species 

 F. filiformis and F. miclonensis by the considerable difference in breadth between the 

 segments of the last order and those which form the middle part of the frond, and by 

 the shape and disposition of the receptacles. Part of the speciraens collected by me 

 at Finmarken agree well with the figure in Fl. Dan., others approach F . filiformis more 

 nearly, so that I thought at first they were a broader and more robust form of this species. 

 Bnt J. G. Agaedh, who has kindly examined some of them, has pronounced the opinion 

 that they should rather be referred to F. linearis, and after having instituted a more 

 careful comparison between them and a greater number of F. filiformis from different 

 localities I cannot but accede to his view. Other specimens resemble F. miclonensis 

 in the form of their receptacles, but are easily distinguished from this species by the 

 peculiar form of the segments. As far as I can see, there is accordingly, no reason, 

 to unite this species with any one of the cognate forms. 



Habitat. I have only once found this species growing. It was met with in rather 

 little number in rock-pools within the litoral zone. At the end of August at Finmarken 

 it bore receptacles in course of dissolution. Accordingly its fruiting season is here 

 probably in July and at the beginning of August. 



Geogr. Distrib. The plant is recorded from the Norwegian Polar Sea, the western 

 Murman Sea, and Baffin Bay. Kleen reports it from the coast of Nordlanden, but I have 



