372 



Tetraspore -bearing piants were found in May and June, cysto- 

 carpic in April, June and July. 



This species is extremely common along the coasts of the Færoes; 

 f. roseola is also fairly common; the latter appears to prefer somewhat 

 sheltered localities in the interior of fjords, where it occurs as a rathcr 

 common epiphyte on different La/m'naWa-species. 



According to Agardh, 1. c. p. 972, Lyngbye's Hutchinsia stricta Ag. 

 (Hydrophyt., p. 115) which he reports from the Færoes: — »Ad insulas 

 Færoenses haud frecpiens«, is this form; but how far his material - 

 which is Polysiphonia urceolata -- is formå roseola I am not prepared 

 to say, though his figure in tab. 36 appears to belong to this form. 



P. lepadicola (Lyngb.) J. Ag., Spec. Alg., Vol. 2, p.945; Hutchin- 

 sia lepadicola Lyngb. 1. c. p. 113. On examining the specimens in 

 Lyngbye's Herbarium they proved to be creeping filaments of / } . 

 urceolata; the latter (which commonly occur on Balanus) differing 

 from the erect filaments in appearance induced Lyngbye to regard 

 them as a distinct species. I myself have gathered specimens, e. g. 

 near Kvivig, which are quite like Lyngbye's, but they naturally 

 occurred in all stages of development, ranging from »P. lepadicola« 

 to well-developed P. urceolata. 



38. P. violacea (Roth) Grev. 



Found epiphytic on Lamiuaria in shallow water. Cystocarp- 

 bearing specimens occurred in May. 



Very rare along the Færoes: —Syd.: Trangisvaag (Ostenfeld, H. S., 

 according to the latter epiphytic on Lamiuaria saccharina). 



39. P. elongata (Huds.) Harv. Kjellm., N. I., p. 158 (122). 



A sublittoral species and found down to a depth of 10 fathoms. 

 It occurs on stones and shells as well as epiphytic on other algæ, 

 e. g. on the stems of Lamiuaria hyperborea. It has been found both 

 in sheltered and exposed localities. 



Tetrasporic piants occurred in March, May, June and July, 

 those bearing cystocarps in December. 



It gives out new shoots in spring, thus specimens collected at 

 Trangisvaag in March had new shoots and leaves; autumn and 

 winter specimens are almost destitute of leaves and new shoots. 



This species, which lins nol previously been reported from the 

 Færoes, was, however, already found there by Mr. Randropp, but the 

 specimens which he sent to Dr. Rostrup were erroneously named 

 Rhodomela subfusca, f. flaccida (Hostrup, l. c. p. 82). This is nol a com- 

 mon species in the Færoes, but al a l'ew piaces, e. g. Vaagfjord, it 

 occurs abundantly. 



