K0N6L. SV, VET. AKADEMIENS HANDLIN6AE. BAND. 20. N:0 5. 313 



The American Arctic Sea: Port Kennedy, Assistance Bay, Beechy Island. 



Baffin Bay: Cumberland Sound, common; Cape Boven; the west coast of Green- 

 land, probably commonly distributed and abundant. I have seen f. typica from Tes- 

 sarmiut, Friderikshaab, Neuherrnhut, and Godhavn. Besides, it is reported from Ja- 

 cobshavn, Rittenbenk, Whale Sound, and Discovery Bay. 



Chsetomorpha Wormskioldii (Fl. Dan.) nob. 

 Conferva Wormskioldii Fl. Dan. t. 1547. 

 Lescr. et Fig. Conferva Wormskioldii Lyngb. Hydr. Dan. p. 158; t. 55. 



Habitat. It grows according to labels by J. Vahl »ad saxa et rupes in summo 

 refluxu maris». 



Geogr. Distrib. It is known only from Baffin Bay. 



Locality: In the herbarium of the Copenhagen Museum there are found specimens 

 taken at Godthaab. It is said by Fabricius to occur ))sat vulgaris at litora maris 

 Groenlandii)) (Cp. Lyngb. 1. c). 



ChaBtomorpha Linum (Roth) Kutz. 



Phyc. Germ. p. 204. Conferva linum Roth, Cat. Bet. 3, p. 257. 



Descr. Chsetomorpha linum KiJTZ. Spec. Alg. p. 378. 

 Fig. » ,, Tab. Phyc. 3, t. 55. 



Syn. Chsetomorpha linum Gobi, Algenfl. Weiss. Meer. p. 87. 



Habitat. Nothing is known in this respect. 



Locality: The White Sea: at Solowetzki Isles according to Gobi 1. c. 



Chaetomorpha Tortuosa (Dillw.) Kleen. 



Nordl. Alg. p. 45. Conferva tortuosa Dillw. Brit, Conf. Syn. p. 46. 



Descr. et Fig. Conferva tortuosa Aresch. Phyc. Scand. p. 433 et t. 3. f. G. 

 Esssicc. » » Aresch. Alg. Scand. exsicc. N:o 29. 



Syn. Chaetomorpha tortuosa Dickie, Alg. Cumberl. p. 240? Nonne Rhizoclonii spec. 

 » » Kleen, Nordl. Alg. p. 45; fide spec. 



Conferva « Sommerf. Suppl. p. 196 (?) Nonne Rhizoclonii spec. 



Habitat. I have found this species only in lagoons on sheltered coasts, forming 

 dense masses of considerable size that lie loose on the bottom or float on the sur- 

 face of the water. On this account it seems to ine improbable that Sommeefelt's 

 Conferva tortuosa, which is said to grow wsupra arenam in rimis rupium», should be 

 the present species. Just as Chcetomorpha tortuosa Dickie (1. c), it may possibly be 

 some species of Rhizoclinium. The specimens of Chcetomorpha tortuosa in Kleen's her- 

 barium, according as I understand this species, have grown in the same kind of loca- 

 lities as those in which I have found the plant. Only sterile specimens are known 

 from the Polar Sea. 



K. Vet. Akad. Handl. B. 20. N:o 6. 40 



