— 142 — 



The collector, Frederik Faber, travelled in Iceland 1819 — 1821; 

 he dwelt a winter (1820 — 1821) at Eyrarbakki in S. Icel., and possibly 

 his specimina of this plant were collected here. 



Fam. Rhodomelaceæ. 



Polysiphonia parasitica (Huds.) Grev., Kjellm. The Algæ of the Arctic 

 Sea p. 1 1 7. 



In the sublitoral region on the fibers of Laminaria hyperborea, in a 

 depth of 10 fathoms. Collected with cystocarps and tetraspores in May. 

 1.5 cm. high. 



S. Icel. Vestmannaeyjar. 



Polysiphonia urceolata (Lightf.) Grev., Strömf. Algveg. p. 24. 



It grows abundantly and gregarious on stones and other algæ in 

 the lower litoral zone, and in the sublitoral region to a depth of 10 

 fathoms in most cases on Laminaria-stems. Collected with cystocarps in 

 May and July, with antherida in June, and tetraspores in May — July. It 

 occurs with hairs in March — August, but specimens without hairs also 

 occur (in Jan. — Febr. and June — July). 



Probably common round Iceland. 



E. Icel. Reyöarfjöröur, Seyöisfjöröur. 

 N. Icel. Gn'msey (O. D.); Eyjafjöröur. 

 NW. Icel. and SW. Icel. common. 

 S. Icel. Eyrarbakki, Vestmannaeyjar. 



Polysiphonia Brodiæi (Dillw.) Grev. 



In the herbarium of the Botanical Museum in Copenhagen there is one 

 specimen of this plant, said to have been collected in Iceland, but as both 

 the collector and the finding-place are unknown I mention it here with doubt. 

 On the label is written in Schousboe's handwriting: Ex. Islandia. 



Polysiphonia elongata (Huds.) Harv. 



In the herbarium of the botanical Museum in Copenhagen there is one 

 specimen of this plant, said to have been collected in Iceland, but as neither 

 the collector nor the finding-place is known, I mention it here as a doubtful 

 Icelandic plant. On the label is written in Schousboe's handwriting : Ex. 

 Islandia. 



Polysiphonia fastigiata (Roth) Grev., Strömf. Algveg. p. 24. 



In the litoral zone, as usually, on Ascophyllum nodosum. Collected 

 with antheridia in May, with cystocarps and tetraspores in July — August. 

 3,5 cm. high. 



