KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 20. N:0 5. 251 



The White Sea: f. ramusculifera. 



The Siberian Sea: (f, typica and f. ramusculifera) rare and so dwarfed as to be almost 

 unrecognizable at Irkaypi and Pitlekay. 



Baffin Bay. Cumberland Sound; the west coast of Greenland probably common; 

 found at Nanortalik, Fiskernaes, Sukkertoppen, Hunde Islands, Godhavn, Egedesminde, 

 Rittenbenk, Melville Bay, Whale Islands, Discovery Bay. 



Gen. Oastagnea (Derb. et Sol.) J. G. Ag. 



Alg. Syst. 2, p. 33; Dbrb. et Sol. Mem. phys. Alg. p. 56, sec. J. G. Ag. 1. c. 



Castagnea divaricata (Ag.) J. G. Ag. 



1. c. p. 37. Chordaria divaricata Ag. Syn. Ag. p. 12. 



Descr. Castagnea divaricata J. G. Ag. 1. c. 

 Fig. Mesogloia divaricata KiJTZ. Tab. Phyc. 8, t. 8. 

 Exsicc. Chordaria divaricata Aresch. Alg. Scand. exsicc. N:o 98. 

 Syn. Chordaria divaricata Kleen, Nordl. Alg. p. .39. 



Locality. It is uncertain whether this species really lives in the Polar Sea. A 

 specimen furnished with sporangia was found in August washed ashore at Bod5 in 

 Nordlanden, accordingly at the southern limit of the Polar Sea. Most probably it has 

 grown in the neighbourhood, and the species may thus be regarded as belonging to 

 the Flora of the Polar Sea. 



Gen. Eudesme J. G. Ag. 



Alg. Syst. 2, p. 29. 



Eudesme virescens (Carm.) J. G. Ag. 



1. c. 31. Mesogloia virescens Carm. in Hook. Brit. FI. 2, p. 387. 



Descr. Eudesme virescens J. G. Ag. 1. c. 



Mesogloia virescens » Spec. Alg. 1, p. 56. 



Fig. » » Harv. Ner. Am. 1, t. 10, fig. b. 



Exsicc. Castagnea virescens Aresch. Alg. Scand. exsicc. N;o 315. 



Syn. Castagnea virescens Gobi, Algenfl. Weiss. Meer. p. 72. 

 » » Kleen, Nordl. Alg. p. 36. 



» Zosterse » » » » >> 



Habitat. It grows sometimes in the upper part of the sublitoral zone, usually 

 within the literal zone, partly on stones or algae above low-water mark, partly in rock- 

 pools below that line. It occurs scattered both on exposed and on sheltered coasts. 

 It is found with zoosporangia in the Norwegian Polar Sea during the whole summer 

 to the middle of September. 



