372 
Tetraspore-bearing plants were found in May and June, cysto- 
carpic in April, June and July. 
This species is extremely common along the coasts of the Faeroes; 
f. roseola is also fairly common; the latter appears to prefer somewhat 
sheltered localities in the interior of fjords, where it occurs as a rather 
common epiphyte on different Laminaria- species. 
According to Agardh, 1. c. p. 972, Lyngbye’s Hutchinsia stricta Ag. 
(Hydrophyt., p. 115) which he reports from the Faeroes: — »Ad insulas 
Faeroenses haud frequens«, is this form; but how far his material — 
which is Polysiphonia urceolata — is forma 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 P. 
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. vioSacea (Roth) Grev. 
Found epiphytic on Laminaria in shallow water. Cystocarp- 
bearing specimens occurred in May. 
Very rare along the Faeroes: — Syd.: Trangisvaag (Ostenfeld, H. S., 
according to the latter epiphytic on Laminaria 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 algae, 
e. g. on the stems of Laminaria hyperborea. It has been found both 
in sheltered and exposed localities. 
Tetrasporic plants 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 has not previously been reported from the 
Faeroes, was, however, already found there by Mr. Randropp, but the 
specimens which he sent to Dr. Rostrup were erroneously named 
Rhodomela snbfnsca , f. flaccida (Rostrup, 1. c. p. 82). This is not a com¬ 
mon species in the Faeroes, but at a few places, e. g. Vaagfjord, it 
occurs abundantly. 
