374 
Found in shallow as well as deep water, and both along shel¬ 
tered and exposed coasts. At the head of Kalbakfjord it was found 
attached to stones in quite shallow water which had a strong ad¬ 
mixture of fresh water. Fructifying specimens have not been 
met with. 
This species seems to be rather rare along the Faeroese coasts. Lyng- 
bye (Hydrophyt., p. 109: »Habitat ad insulas Faeroenses«) reports it 
from the Faeroes, but no Faeroese specimens of it are to be found in 
his herbarium. Rostrup writes with reference to it »a few specimens 
only were found.« 
I have seen specimens from: — Str.: Head of Kalbakfjord (!), Gli- 
versnaes(!); Ost.: Ore(!); Syd.: Trangisvaag (Ostenfeld). 
43. P. fastigiata (Roth) Grev. Kjellm., N. I., p. 159 (123); Hut- 
chinsia fastigiata Lyngb., 1. c. p. 108. 
Found in the littoral zone, almost exclusively on Ascophyllum 
nodosum ; but Lyngbye says that in a few rare instances he found 
it growing also on Fucus vesiculosus and on rocks. Tetraspore- 
bearing specimens were found in June and July, cystocarpic in 
July and August. Its dense, bushy growth affords a favourable 
habitat for numerous small epiphytes, especially Chantransia secun- 
data and crusts of Dermocarpa. It is perennial and has been found 
with young shoots in the beginning of March. 
This species is common everywhere where Ascophyllum is met with, 
i. e. in somewhat sheltered and perfectly quiet places. 
PTEROSIPHONIA Fkbg. 
44. P. parasitica (Huds.) Fkbg. Die Rhodomelaceen des Golfes 
von Neapel, p.265; Kjellm., N. I., p. 152 (117); Hutchinsia Mostingii 
Lyngb., Hydrophyt., p. 116, tab. 36. 
Found along exposed coasts in the sublittoral zone and espe¬ 
cially abundant in caves in shallow water where at low tide it may 
easily be gathered in a hand-dredge at a depth of about one fathom. 
Grows here on the vertical faces of rocks and found attached either 
to the rock itself or to shells and Litliothanmion polymorphum, often 
associated with Lomentaria clavellosa, Plocamium coccineum, Deles- 
seria sinuosa and other Floridece . 
In Trangisvaagfjord Jonsson found a specimen growing at¬ 
tached to a crab which he dredged from a depth of 10 fathoms. 
This species is hardly rare along the exposed coasts of the Faeroes. 
Found in the following places: — Str.: Kvivig (Lyngb., ! in caves); Ost.: 
Molen (Lyngb.,!); Vaago: cave on the north side(!), cave opposite 
Kvivig (!); St. Dim on (!); Syd.: Kvalbo Ejde (H. S.), Trangisvaagfjord (H.J.). 
