110. KJELLMAN, THE ALG OF THE ARCTIC SEA. 
me to admit that this plant, so sharply distinguished in its purely arctic form from 
kh. lycopodioides, is yet so nearly related to it that no definite limits can be drawn 
between them. Besides, | must concede, on the other side, that the uniting of Rh. 
lycopodioides and Rh. subfusca insisted on by Gosi, however unnatural it may appear 
at first, has nevertheless a great probability, considering the number of diverse forms 
under which Ah, lycopodioides appears, several among which come extremely near Rh. 
subfusca (Woopw.) Ac. However, in this admission I must make a decided restriction. 
By the excellent works of J. E. Arescuouc Swedish algologists have been made well 
acquainted with the fact that there are to be found on the west coast of Sweden three 
forms of Rhodomela, one characterized by the just mentioned algologist as forma eatra- 
teniensis et normalis, the second as forma intrateniensis precedentis magnitudinis et 
crassitiei, the third as forma gracilis. AnrescuouG regards all three as forms of Rhodo- 
melu subfusca (Woopw.) (see Argescu. Obs. Phyc. 3, p. 6). All have been distributed 
in magnificent specimens in Alg. Scand. exsicc. under N:o 57, 58, 303, Ser. 2 and N:o 
54 Ser. 1. I have had an opportunity of more closely examining living specimens of 
the two first of these in different stages of development and at different times of the 
year, and I have found them to disagree so essentially in habit, morphological deve- 
lopment, anatomical structure, and biological conditions, that I must account them 
different species, if indeed any species of Rhodomela are to be distinguished at all. 
Only one of these two can be regarded as nearly related to Rh. lycopodioides; the 
other is surely sharply distinct from it. In order to be able to expose this question 
more fully, I think best to give already here a description of these two Swedish species 
of Rhodomela, although this does not belong strictly to the immediate subject of this 
work. I shall begin with the above-mentioned forma intrateniensis. As far as I can 
see, it has not been described or figured under any specific name, at least not so as to 
be recognizable. I propose to name it Ah. virgata. 
Rhodomela Virgata novum nomen. 
yy 
Tab. nostra 7. Exsicc. ArgescH. Alg. Scand. exsice. N:o 303. 
Description. A spring plant of the first year, according to a specimen from Bohus- 
lan taken in the middle of May; fig. 1. About 20 cm. high; when dry, with flat main 
stem and flat primary branches, which do not become black; of a red-brown colour. 
The hold-fast is a callus radicalis. The frond is distinctly repeatedly racemosely branched. 
A main axis is distinguishable throughout the whole frond; it attains its greatest thick- 
ness at the middle, tapering rather swiftly towards the summit, gradually towards the 
base, abruptly only in the vicinity of the hold-fast. Throughout its whole length, it 
bears branch-systems, diminishing upwards in length and strength. The lower ones 
have a lanceolate, the upper ones an ovato-triangular periphery. The main axes of the 
lower larger branch-systems are thickest at the middle and taper strongly towards the 
tip as well as towards the base. At the point where they branch off from the main 
stem, their thickness is considerably smaller than that of the stem. The lower lateral 
axes of the first order carry few and very finely decompound, short, branch-systems 
