KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 20. N:o 5. 129 
Gen. Chantransia (DC.) Frirs. 
Syst. Veg. p. 338; DC. Fl. Fr. 2, p. 49; lim. mut. 
Chantransia efflorescens (J. G. Aa.) Kuenem. 
Spetsb. Thall. 1, p. 4. Callithamnion efflorescens J. G. AG. Spee. Alg. 2, p. 15. 
f. tenuis. 
f. laxe czespitosa, qvam forma typica in Sinu Codano proveniente multo tenuior et flacecidior; articulis 
axis principalis 5 a. diametro non attingentibus, (in f. typiea 6—8 «.) 
Fig. Chantransia efflorescens f. tenuis tab. nostra 12, fig. 1—2. 
Easiee. Cfr. Trentepohlia Daviesii var. @ Arescu. Alg. Seand. exsice. N:o 16. 
Syn. Chantransia Daviesii Gost, Algenfl. Weiss. Meer, p. 50. 
» efflorescens KseLLM. Spetsb. Thall. 1, p. 14; Algenv. Murm. Meer. p. 14; Kariska 
hafvets Alg. p. 20. 
Remark on the determination of the species. The Chantransia efflorescens found by 
me at several places in the Polar Sea, differs from that occurring on the coast of Bo- 
huslin and distributed by Arescnoua |. ¢. by being scarcely half as thick, and more 
flaccid, and by forming thinner tufts than the Bohuslin form. I have assumed it to 
be the same form as that reported by Goxr from the White Sea, and propose to give 
it the name of tenuis. 
Habitat. This alga is sublitoral everywhere in the Polar Sea, and grows attached 
to various other alge, as Lithothamnion soriferum, Odonthalia dentata, Polysiphonia are- 
tica, Delesseria Beri, Chatomorpha melagonium a. o. It has not been met with in the 
interior of deep bays. It lives scattered. It has been found with reproductive organs 
at Spitzbergen in July and August, on the west coast of Novaya Zemlya in July 
and on the eastern coast at the end of August. On the coast of Sweden I have ob- 
served sporiferous specimens in August. 
Geogr. Distrib. It belongs both to the Atlantic and the arctic region of the Polar 
Sea, and is pretty widely spread within the latter. I have found it to be scarce every 
where. Its maximum of frequency seems to be in the White Sea, Cp. Gost 1. ec. 
Localities: The Norwegian Polar Sea: Finmarken at Maasé, scarce and local. 
The Greenland Sea: the north and north-west coasts of Spitzbergen, scarce and local. 
The Murman Sea: the west coast of Novaya Zemlya, scarce and local. 
The White Sea: common and abundant. 
The Kara Sea: Uddebay on the east coast of Novaya Zemlya, scarce. 
Chantransia Daviesii (Ditiw.) Tuur. 
in Le Jol. List. Alg. Cherb. p. 106. Conferva Daviesii Dituw. Brit. Conf. Intr. p. 73. 
Deser, Callithamnion Daviesii J. G. Ac. Epier. p. 8. 
Fig. » » Harv, Phyce. Brit. t. 314. 
Syn. Chantransia Daviesii Kunpn, Nordl. Alg. p. 16. 
Habitat. This species grows scattered, fastened to litoral algw, for inst. species of 
Corallina and Cladophora a. 0. In the Polar Sea it bears spores at least during the months 
of July, August, and September. 
] | and 
K. Vet. Akad. Handl. B. 20. N:o 5. ‘ 
