492 
J. Ag., Till. Alg. Syst. 3, p. 129; Rosenv., Gronl. Havalg., p. 960; Scyto- 
siphon compressus 0 crispatus Lyngb., Hydrophyt., p. 64 ex parte. 
To the present plant I have referred some specimens more or 
less ramified and prolific, which hear a close resemblance to the 
figure in Flora Danica tab. 763 and to Kutzing’s fig. 3, tab. 30 in Tab. 
phyc. The cells being arranged in more or less distinct rows or 
even without any order whatever, and the inner wall being occa¬ 
sionally somewhat thickened. I have further referred to this variety 
some quite branchless specimens, resembling E. intestinalis, var .genuina 
which had, however, only a slightly thickened inner wall, and 
were, besides, more or less closely covered with quite thin prolifi- 
cations a few cm. in length. Specimens of this rather characteristic 
form will be distributed in Witt rock and Nordstedt’s Algae 
exsiccatae. 
A ramified and prolific form from Kalbakfjorden, belonging to 
this variety, also showed distinct trabeculae, which agreed closely 
in essential points with Rosen vinge’s description (1. c. p. 961). 
These septa were, however, a great deal thinner than those in the 
Greenland specimens, and corresponded closely with those described 
in var. compressa. 
The specimen of Scytosiphon compressus 0 crispatus Lyngb., 
Hydrophyt., p. 64 from »littus Eldevig, 0stero,« preserved in 
Lyngbye’s herbarium, may be referred to this variety. And owing 
to the more thorough knowledge acquired in examining my con¬ 
siderable material of the marine Enteromorphae , I have arrived 
at a somewhat different conclusion regarding the plant which in 
my paper on the »Freshwater Algae« (pp. 243—5) I have called 
Enteromorpha compressa on the strength of the material gathered 
partly by Lyngbye on Stromo, partly by Ostenfeld on Fuglo, 
in both places in running streams far up on the hills. I think it 
now most natural to refer the specimens in question to var. prolifera , | 
but I must emphasize the fact that they, more particularly on ac- j 
count of their comparatively small cells, also remind one somewhat 
of var. micrococca. 
Enteromorpha intestinalis, as here defined, occurs practically every- J 
where in the most different localities along the Fieroese coasts, either 
between tidemarks or in quite shallow water. But in their typical form | 
each different variety has its distinguishing habitat. Thus, var. genuina j 
is most commonly found in high-lying tide-pools where the water is , 
brackish, often almost quite fresh, and even sometimes stagnant. 1 have | 
found it in tide-pools at a height of about 80 feet above sea-level. Var. i 
