399 
came across it growing in caves, where it may be found forming 
large, wide-spread, shiny crusts of a dark-red colour on the rock 
faces, from somewhat above high-water mark downwards. In the 
sublittoral zone it grows on shells and stones as also epiphytic on 
the stalks of Laminaria (especially L. hyperborea). It is common 
both on open sea-shores, and in sheltered localities in the interior 
of fjords and sounds, e. g. in Sundene between Tliorsvig and Kvalvig 
where it grows luxuriantly on stones under Laminaria fceroensis. 
Owing to want of specimens collected during the winter months 
proper, the greater part of the material was sterile 1 , but some 
specimens, collected in June, August and November, were found 
bearing a few tetraspores. 
It seems to be fairly common along the coasts of the Faeroes, and 
was already found by Lyngbye, whose herbarium contains specimens 
from Kvivig, and who writes with reference to its habitat: — »Ad insulas 
Faeroenses latera rupium declivium in infimo refluxus limite obvestiens, 
ut ad Quivig et inter Thorshavn et Hoyvig«. 
PEYSSONNELIA Decsne. 
69. P. Dubyi Crouan. Kjellm., N. I., p. 180 (140). 
Found in the sublittoral zone from a depth of 2 to 10 fathoms. 
Usually it grows attached to stones and shells, but also occurs 
epiphytic on the stems of Laminaria hyperborea. Met with both in 
the open sea and in the interior of fjords in sheltered localities. 
Specimens gathered during the summer months were sterile; 
in a single collection gathered late in October specimens were found 
bearing tetraspores. 
Found at the following places: — Bordo: Haraldsund (H.J.); Ost.: 
Skaalefjord (H. J.); Str.: Sundene between Thorshavn and Kvalvig (!), 
Thorshavn (!), Gliversnaes (!). 
RHODODERMIS Crouan. 
70. Pi. elegans Crouan. 
Found in the sublittoral zone a few times on stones and shells. 
Tetraspore-bearing plants collected in May and July. 
Found hitherto: — Str.: Kalbakfjord (H. J.), Gliversnaes (!); Syd.: 
Trangisvaagfjord (!). 
1 It is ven^ difficult to determine sterile Squamariace-material, as e. g. Cruoria 
pellita, and Petrocelis cruenta and P. Hennedyi resemble each other very closely 
when sterile. I think therefore that, at any rate, P. Hennedyi, which has been 
found along the shores of Iceland, also occurs around the Faeroes. 
