KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 20. N:0 5. 201 
Fucus ceranoides L. 
Spec. Plant. 2, p. 1158. 
f. typica nob. 
Descr. Fucus ceranoides Harv. Phye. Brit. t. 271. 
Fig. » » Harv. |. c. et Kieren, Nordl. Alg. t. 10, fig. 4 
f. Harveyana Dcsne nob. 
Voyage Venus t. 4. 
Descr. Fueus Harveyanus J. G. Ac. Spetsb. Alg. Bidr. p. 10 et Till. p. 43. 
Fig. » eeranoides Kuren, Nordl. Ale. t. 10, fig. 2. 
f. divergens J. G. AG. nob. 
Fucus divergens J. G. AG. Gronl. Lam. och Fue. p. 28. 
Deser. Fueus divergens J. G, AG. 1. ce. 
Fig. » ceranoides Kirn, Nordl. Alg. t. 10, fig. 1. 
Syn. Fueus ceranoides Lynes. Hydr. Dan. p. 5; fide syn. quoad spee. Groenl. (?). 
» » Sommerr. Suppl. p. 182; fide syn. 
Remark on the forms of this species. Since I have seen the excellent and highly 
instructive series of forms of Fucus ceranoides which Kuren has brought home from 
Nordlanden, and had the opportunity of comparing these forms with the two forms of 
Fucus found in the Arctic Sea proper, /. Harveyanus and I. divergens, | cannot but 
adopt Kiern’s opinion that these two must not be regarded as independent. species, 
but are, in fact, forms of Ff. ceranoides. However, these forms occurring independently 
in widely distant parts of the Arctic Sea, I have thought best to set them down under 
the names once attributed to them. 
Habitat. In the Norwegian Polar Sea, this alga is litoral, growing in such places 
where salt water is mixed with fresh water. J. divergens appears in almost fresh 
water. About its mode of occurrence in the Arctic Sea I know only what is stated by 
J. G. AGarpu, who follows Beracren, namely that f. divergens grows on the west coast 
of Greenland »in scrobiculis». In Kunen’s collections there are many individuals with 
receptacles. They have been collected in July and August. I have seen specimens 
with receptacles of f. Harveyana from Spitzbergen and of f. divergens from Greenland. 
These had also been gathered in summer, in July and August. 
Geogr. Distrib. The plant is known from isolated parts of the Atlantic and the 
aretic regions of the Polar Sea. In neither of these seas it is commonly spread. The 
northernmost locality where it has been found is the coast of Spitzbergen. 
Localities: The Norwegian Polar Sea: Nordlanden (ff. typica, Harveyana, and di- 
vergens) at several places. 
The Greenland Sea: the coast of Spitzbergen; the exact place is not stated (f. arveyana). 
Baffin Bay: the west coast of Greenland at Rittenbenk (f. divergens). 1 doubt 
that Lynenyr’s Fucus ceranoides from Greenland is the present species. In the her- 
barium of the Copenhague Museum there is no form to be found that can be referred 
to Ff. ceranoides. 
~) » 
K. Vet. Akad. Handl. Band. 20. N:o 5. 26 
