346 
This species belongs to the sublittoral zone and occurs both 
along exposed and sheltered coasts. It has been found as an epi¬ 
phyte only, and in abundance especially on Desmarestia aculeata , 
which it sometimes covers quite closely, but it may also be met 
with though sparingly on Ptilota plumosa (at a depth of 20 fathoms) 
and Delesseria alatct. It has hitherto been found sterile only. A single 
specimen from Vestmanhavn was possibly fructifying, but being 
dried it was not capable of closer examination. As pointed out by 
Kuckuck, 1. c., its chromatophores are not star-like, radiating from 
a central pyrenoid, as in the true Porphyra- species, but they occur 
as a more or less deeply indented parietal plate, hence I agree with 
Kuckuck in thinking that this species ought to be separated from 
the genus Porphyra. 
This species was first reported from the Faeroes in Rostrup’s list 
(1. c. p. 88) to whom it was sent by Mr. Randropp, who probably 
gathered it near Thorshavn. My specimens are from: — Ost.: Molen (!), 
Ore(!); Str.: Vestmanhavn (!), Kvivig(l), Gliversnaes (!); Syd.: Ordevig (J). 
3. P. leucosticta Thur. Le Jobs, Alg. mar. de Cherb., p. 100. 
In comparison with the specimens (especially from France) 
which I have had the opportunity of seeing in the collections be¬ 
longing to the Botanical Museum in Copenhagen, the Faeroese spe¬ 
cimens are generally larger and especially broader and more irregu¬ 
larly shaped; the antheridia-sori are likewise broader and of a more 
irregular form, and arranged irregularly in the thallus and not in 
the often almost parallel lines which are met with in the French 
specimens. The colour is not so red as that of P. miniata , but is 
just between that of P. miniata and P. umbilicalis. 
Along the coasts of the Fseroes this species grows both in the 
littoral zone near low-water mark and in the sublittoral in shallow 
water. It occurs most commonly in the Corallina- belt. Fructifying 
specimens were found from April to August. 
It appears to be fairly common: —Vid: Viderejde (Ostenfeld); Str.: 
Vestmanhavn (!), Kalbakfjorden (!), Thorshavn (!), Velbestad (!); Sand 6: 
Skopen (!); Syd: Kvalbo (Lyngb.; H. S.), Trangisvaag (Ostenfeld)). Lastly, 
Simmons mentions it with doubt from Klaksvig (Bordo). 
First reported from the Faeroes by Simmons but as mentioned 
above, it was already found by Lyngbye, as a specimen in his her¬ 
barium determined as Ulva umbilicalis and gathered July 8th near 
Kvalbo is this species. 
