KONGL. SV, VET. AKADEMIENS HANDLINGAR. HAND. 20. N:0 5. 129 



Gen. Ohantransia (DC.) Fries. 



Syst. Veg. p. 338; DC. Fl. Fr. 2, p. 49; lim. mut. 



Ohantransia efflorescens (J. G. Ag.) Kjellm. 



Spetsb. Thall. 1, p. 4. Callithamnion efflorescens J. G. Ag. Spec. Alg. 2, p. 15. 



f. tenuis. 



f. laxe csespitosa, qvam forma typica in Sinu Codano proveuiente multo tenuior et flaccidior; articulis 

 axis principalis 5 /.i. diametro iion attingentibus, (in f. typica 6 — 8 //.) 

 Fig. Ohantransia efflorescens f. tenuis tab. nostra 12, fig. 1 — 2. 

 Exsicc. Cfr. Trentepohlia Daviesii var. a Aresch. Alg. Scand. exsicc. N:o 16. 

 Syn. Ohantransia Daviesii Gobi, Algenfl. Weiss. Meer, p. 60. 



» efflorescens Kjellm. Spetsb. Thall. 1, p. 14; Algenv. Murm. Meer. p. 14; Kariska 



hafvets Alg. p. 20. 



Remark on the determination of the species. The Ohantransia efflorescens found by 

 me at several places in the Polar Sea, differs from that occurring on the coast of Bo- 

 huslan and distributed by Areschoug 1. c. by being scarcely half as thick, and more 

 flaccid, and by forming thinner tufts than the Bohuslan form. I have assumed it to 

 be the same form as that reported by Gobi from the White Sea, and propose to give 

 it the name of tenuis. 



Habitat. This nlga is sublitoral everywhere in .the Polar Sea, and grows attached 

 to various other algae, as Lithothamnion soriferum, Odonthalia dentata, Polysiphonia arc- 

 tica, Delesseria Bcerii, Chostomorpha 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 everj^ 

 where. Its maximum of frequency seems to be in the White Sea, Cp. Gobi 1. c. 



Localities: The Norwegian Polar Sea: Finmarken at Maaso, 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. 



Ohantransia Daviesii (Dillw.) Thur. 



in Le Jol. List. Alg. Oherb. p. 106. Oonferva Daviesii Dillw. Brit. Conf. Intr. p. 73. 

 Descr. Oallithamnion Daviesii J. G. Ag. Epicr. p. 8. 

 Fig. » » Harv, Phyc. Brit. t. 314. 



Syn. Ohantransia Daviesii Kleen, Nordl. Alg. p, 16. 



Habitat. This species grows scattered, fastened to litoral algae, for inst. species of 



Corallina and Cladophora a. o. In the Polar Sea it bears spores at least during the months 



of July, August, and September. 



17 



K. Vet. Akad. Handl. B. 20. N:o 6. ■•■ ' 



