KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 20. N:0 5. 263 
Gen. Dichloria Grev. 
Ale. Brit. p. XL. 
Dichloria viridis (Mttu.) Grev. 
]. c. p. 39. Fucus viridis Mtxy. Fl. Dan. t. 886. 
Descr. Dichloria viridis J. G. Ac. Spec. Alg. 1, p. 164. 
Fig. Desmarestia viridis Harv. Phyc. Brit. t. 312. 
Exsice. » »  <Aregscu. Ale. Scand. exsice. N:o 88. 
Syn. Desmarestia viridis ArmscuH Phyc. Scand. p. 348. 
» » Dickie, Alg. Sutherl. 1, p. 140. 
» »  KygetiM. Vinteralgv. p. 65. 
» » Post. et Rupr. Ill. Alg. p. II. 
Dichloria viridis J. G. Ac. Spetsb. Alg. Till. p. 27; Gronl. Alg. p. 110. 
» » Gost, Algenfl. Weiss. Meer. p. 67. 
» »  Kygeuim. Spetsb. Thall. 2, p. 42; Algenv. Murm. Meer. p. 48. 
» »  Kugen, Nordl. Alg. p. 39. 
Dictyosiphon foeniculaceus ZELLER, Zweite d. Polarf. p. 86; sec. spec. 
Fucus viridis We. Fl. Lapp. p. 503. 
Habitat. In the Norwegian Polar Sea this species lives both within the litoral 
and the sublitoral zone. In the latter case it is usually found among the formation 
of Laminariacee, but it descends deeper down than thisdoes. In the Arctic Sea proper 
it is never litoral; on the contrary it is often elitoral, growing at greater depths than 
any other alga. At Spitzbergen it occurs at a depth of 5—150 fathoms. It is usually 
attached to stones, sometimes to larger alge, and prefers exposed localities both near 
the coast and far out in the open sea. It grows scattered. On the coast of Spitzbergen 
it attains a high degree of luxuriancy. Here there are not seldom found bushing spe- 
cimens, richly branched, half a metre in length. Only sterile individuals have been 
met with. 
Geogr. Distrib. Known only from the Polar Sea to the north of the Atlantic. 
Its maximum of frequency is on the coasts of Spitzbergen. The most northern point 
where it has been taken is Treurenberg Bay on the north coast of Spitzbergen, Lat. 
Naso 56). 
Localities: The Norwegian Polar Sea: Nordlanden at several places, but rather 
scarce; Tromsé amt about the town of Tromsé; Finmarken: Maasd, Gjesver, the south 
coast of Mageré, Oxfjord, Talvik, rather common and abundant. 
The Greenland Sea: the east coast of Greenland; along the north and west coasts 
of Spitzbergen common and abundant. 
The Murman Sea: the coast of Cisuralian Samoyede-land; the west coast of No- 
vaya Zemlya common and abundant. 
The White Sea: rare. 
Baffin Bay: the west coast of Greenland: Hunde Islands, Godhavn, Jakobshavn. 
