397 
Order DUMONTIACEAE. 
DUMONTIA (Lamour.) J. G. Ag. 
65. D. filiformis (FI. Dan.) Grev. Kjellm., N. I., p. 200 (157); 
Gastridium filiforme Lyngb., Hydrophyt., p. 68. 
Found on exposed as well as on sheltered shores, on the former 
even frequently not far from high-water mark, and most commonly 
associated with Scytosiphon lomentarius and Phyllitis fascia in hollows 
containing a little water. On sheltered shores where the tide is 
imperceptible it occurs in quite shallow water. Generally it grows 
attached to rocks and stones, but I have occasionally found it 
epiphytic on Gigartina. So late as July I found quantities of it and 
large vigorous examples, showing that it occurs later in the season 
on the shores of the Faeroes than it does on the Danish shores 
where it is decidedly a spring alga. Jonsson, however, has not 
come across it, so it probably disappears later in autumn. 
This species, which was first mentioned from the Faeroes by Ro- 
strup (1. c. p. 83) is very common there. Lyngbye, curiously enough, 
does not record this species from the Faeroes in his »Hydrophytologia«, 
but in his herbarium in Copenhagen there is a small specimen from 
Kvalbo. 
Dilsea edulis Stackhouse is recorded from the Faeroes by 
P. A. Holm in his »Skildringer af Naturen paa Faeroerne« (Tids- 
skrift for populaere Fremstillinger af Naturvidenskaberne, Vol. II, 
p. 204) but as it has not been found since, this statement, as already 
pointed out by Rostrup (1. c. p. 83, see note), is undoubtedly wrong. 
Order NEMASTOMACEAE. 
FURCELLARIA Lamour. 
66. F. fastigiata (L.) Lamour. Kjellm., N. I., p. 201 (158); Fur- 
cellaria lumbricalis Lyngb., Hydrophyt., pp. 48—49. 
Found most frequently in the sublittoral zone, but also occurs 
now and then in pools between tide-marks. It is most commonly 
met with in not very deep water, about 2—3 fathoms, in open 
ravines and inlets »Skaergaarde«, in fairly exposed places where it 
occurs rather extensively in dense growths on stones and rocky bot¬ 
toms. The greatest depth at which I gathered it was about 10 fathoms. 
All the spring and summer specimens which have been exa¬ 
mined were sterile. Tetrasporic specimens occurred abundantly in 
