KONGL, SV. VET. AKADEMIENS HANDLIN6AK. BAND. 20. N:0 5. 263 



Gen. DicMoria Gee v. 

 Alg. Brit. p. XL. 



Dichloria viridis (Mull.) Grev. 



1. c. p. 39. Pucus viridis MiJLL. PI. Dan. t. 886. 

 Besor. Dichloria viridis J. G. Ag. Spec. Alg. 1, p. 164. 

 Fig. Desmarestia viridis Harv. Phyc. Brit. t. 312. 

 Exsicc. » a Aresch. Alg. Scand. exsicc. N:o 88. 



Syn. Desmarestia viridis Aresch Phyc. Scand. p. 348. 



» » Dickie, Alg. Sutherl. 1, p. 140. 



» » Kjellm. Vinteralgv. p. 65. 



a » Post, el Edpr. 111. Alg. p. II. 



Dichloria viridis J. G. Ag. Spetsb. Alg. Till. p. 27; Gronl. Alg. p. 110. 

 » » Gobi, Algenfl. Weiss. Meer. p. 67. 



» » Kjellm. Spetsb. Thall. 2, p. 42; Algenv. Murm. Meer. p. 48. 



» » Kleen, Nordl. Alg. p. 39. 



Dictyosiphon foeniculaceus Zeller, Zweite d. Polarf. p. 86 ; sec. spec. 

 Fucus viridis Wg. PI. 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 Laminariacece, 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 algae, 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 M'ith. 



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. 

 x\. 79° 56'. 



Localities: The Norwegian Polar Sea: Nordlanden at several places, but rather 

 scarce; TromsS amt about the town of TromsO; Finmarken: MaasO, Gjesvasr, the south 

 coast of Magero, 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. 



