361 
In places where the tide is imperceptible, e. g. in Sundene 
between Stromo and Ostero and in Skaalefjord, this species occurs 
in quite shallow water, often hardly a foot below the surface. But 
where the tide is felt, e. g. at Klaksvig it grows at so great a depth 
as to be hardly left dry except at very low ebb-tide. I only found 
it in particularly sheltered places, but Rostrup and Lyngbye 
gathered it near Thorshavn, consequently, from a more exposed 
locality. Grows most frequently on stones and rocks, but some¬ 
times also attached to other algse. 
Tetraspore - bearing specimens were found in May, June and 
July; cystocarpic in August, September and October, which agrees 
fairly well with Kleen’s report (1. c. p. 18) from Nordland. 
This species, which was first reported from tjie Faeroes by Rostrup, 
was already found there by Lyngbye as what he calls Gigartina 
pinastroides , is this species which was proved by examining the spe¬ 
cimens preserved in his herbarium. In Hydrophyt. he mentions it as 
follows: — »Habitat ad insulas Faeroenses, ut in sinu prope Thorshavn, 
at raro.« But Lyngbye must have been very doubtful as to the cor¬ 
rectness of his determination, for to begin with he labelled the spe¬ 
cimens in question Fucus purpurascens , then he put them in a small 
wrapper on which he wrote »pinastroides«, and this wrapper with con¬ 
tents was again placed among his material of Cystoclonium purpurascens, 
where it was found by Dr. Rosenvinge some years ago when he 
arranged Lyngbye’s Herbarium; so Lyngbye himself must have dis¬ 
covered his error. 
This species does not appear to be widely distributed along the 
shores of the Faeroes: — 
Bor do: Klaksvig (Rostr., H. S.!); Ost.: Glibre (!), Straender (H. J. !); 
Str.: Sundelaget (!), Kvalvig (!), Thorshavn (Lyngb., Rostr.). 
EUTHORA. J. Ag. 
24. E. cristata (L.) J. Ag. Kjellm., N. I., p. 186 (145); Spaerococcus 
cristatus Lyngb., Hydrophyt., p. 13. 
There occur two forms of this species, a broader and more 
robust form — f. typica peculiar to exposed localities, and a nar¬ 
rower but larger form — f. angustata Lyngb., which I have only 
met with in sheltered places in fjords or narrow sounds. 
This species generally occurs in the sublittoral zone, and 
luxuriant specimens were found down to a depth of 25 fathoms. 
In caves I found it almost at the water’s edge, but hardly so far 
up as to be left uncovered at ebb-tide. Kleen (1. c. p. 17) mentions 
very much the same occurring in Nordland. It was met with in 
