KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 20. N:0 5. 207 
the preserving, retains its dark-brown colour at least in the upper segments. FP. mi- 
clonensis comes more near Ff. linearis, from which it is scarcely to be distinguished 
except by the different shape of the upper segments. It also approaches I. edentatus 
f. contracta, as Kiren has rightly noticed, but may be recognized from it by means 
of the characteristics given by Kriren; 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 Maasé, about Lat. N. 71°. 
Localities: The Norwegian Polar Sea: Nordlanden scarce; Fininarken, local and 
scarce at Maaso. 
Fucus linearis Fl. Dan. 
t. 351. 
Descr. Fucus linearis J. G. Ac. Spetsb. Alg. Till. p. 39. 
Fig. » » Fl. Dan. |. c. 
Syn. Fucus distichus Gost, Algenfl. Weiss. Meer. p. 52; ex parte. 
» » Kieen, Nordl. Alg. p. 30; ex parte? 
» linearis J. G. Ac. Enum.; Grénl. Alg. p. 110; Gronl. Lam. och Fue. p. 29. 
Remark on the species. The plant delineated in Fl. Dan. 1. c. under the name of 
Ff. 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 
FP. 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 specimens collected by me 
at Finmarken agree well with the figure in Fl. Dan., others approach F. jiliformis more 
nearly, so that I thought at first they were a broader and more robust form of this species. 
But J. G. Acarpu, who has kindly examined some of them, has pronounced the opinion 
that they should rather be referred to FP. linearis, and after having instituted a more 
careful comparison between them and a greater number of F. jiliformis from different 
localities I cannot but accede to his view. Other specimens resemble /’. 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 Baftin Bay. Kieren reports it from the coast of Nordlanden, but I have 
