KOXGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 20. N:0 5. 323 



zone. It is scarce here, and nowhere occurs in great masses. It has been found 

 both on exposed and sheltered coasts. I have collected specimens with hormogonia in 

 development on the coast of Spitzbergen in July. 



Geogr. Distrib. Known from the Polar Sea north and north-east of the Atlantic. 

 Its maximum of frequency is on the coast of Norway. Its most northern point is 

 Fairhaven on the north-west coast of Spitzbergen, Lat. N. 79° 49'. 



Localities: The Norwegian Polar Sea: Finmarken at Maas5 and Giesvaer, rather 

 common and abundant. 



The Greenland Sea: rather common, but in small numbers on the west coast of 

 Spitzbergen. 



The Murman Sea: local and scarce on the west coast of Novaya Zemlya and 

 Way gats. 



Calothrix Confervicola Ag. 

 Syst. Alg. p. 70. 



Descr. et Fig. Calothrix confervicola Born, et Thdr. Not. algol. 1, p. 8 et t. 3.. 

 Syn. Calothrix confervicola Gobi, Algenfl. Weiss. Meer. p. 88. 



Habitat. Found attached to Phlceospora tortilis. 



Locality: The White Sea: Solowetzki Isles (Cfr. Gobi, 1. c.) 



Fam. OSCILLARIACE^ (Ag.) Nordst. 



PL Scand. p. 53. Oscillatorinae Ag. Syst. Alg. p. XXIV; lira. mut. 



Gen. Lyngbya (Ag.) Thuk. 



Nostoch. p. 4; Ag. Syst. Alg. p. XXV; char, emend. 



Lyngbya Semiplena (Harv.) nob. 

 Descr. et Fig. Calothrix seniiplena Harv. Phyc. Brit. t. 309. Cfr. Symploca Harveyi Thur. Nostoch. p. 8. 



Habitat. Found growing on wood-work within the litoral zone in a sheltered 

 locality, in small numbers. 



Locality: The Norwegian Polar Sea: Finmarken at Talvik, local, scarce. 



Gen. Oscillaria (Bosc.) Thur. 



Nostoch. p. 4 et 7; Bosc. sec. Thur. 1. c. 



Oscillaria Subsalsa Ag. 



Oscillatoria subsalsa Ag. Syst. Alg. p. 66. 

 Descr. Oscillaria subsalsa KiJTZ. Spec. Alg. p. 246. 

 Fig. » » " Tab. Phyc. 1, t. 42, fig. 5. 



