421 
Some other specimens, which I have also referred to this spe¬ 
cies and which likewise grew near Vaags Ejde, but epiphytic on 
Laminaria, have basal hairs only. 
Lastly, some examples occurred on Rhodymenia near Thors- 
havn which are quite destitute of hairs. These examples have a 
basal disc which is composed of fdaments more or less free along 
the margin, but grown together towards the centre. The erect 
filaments shown in fig. 77 spring from this basal disc and are more 
slenderly built than is the case with those of the hair-bearing 
form. The plurilocular sporangia are cylindrical and about 5—6 y 
thick. 
It is possible that I have here been referring several different 
species to Myrionema globosum and the last-named examples espe¬ 
cially appear to me to differ rather widely from it; nevertheless 
1 think for the present we are justified in keeping them together. 
This species has been found in the littoral zone as well as in 
the sublittoral in shallow water in fairly exposed situations. It 
grows as an epiphyte on different larger algse. 
Sporangia-bearing specimens were met with in April, May 
and June. 
Found hitherto in the following places: — Str.: Thorshavn and 
Arge on Rhodymenia palmata (!); Syd.: Frodebo on Himanthalia lorea (l ); 
Vaags Ejde on Himanthalia and Laminaria (!). 
99. M. speciosum nov. spec. 
This plant (fig. 78) consists of a basal disc (fig. 78, h) composed 
of one layer of cells whence proceed erect filaments. The basal 
disc has a distinctly marginal growth (fig. 78, g ) and is composed 
of filaments which are loosely connected along the margin, but 
towards the centre are grown together to a pseudo-parenchymatous 
tissue. The cells in the basal disc are about 8—10 y broad and 
of variable length, i. e. from about as long as they are broad to 
2 — 3 — 4 times as long. From some distance within the margin 
the erect filaments begin to occur and proceed from almost all the 
cells in the disc. The erect filaments attain to a length of about 
6 — 800 y; at first they consist of a longer or shorter vegetative 
part, the cells of which are 10 y thick, and about twice as long 
as they are thick, and higher up they bear either plurilocular or 
unilocular sporangia. The plurilocular sporangia vary in form 
from oblong-ovate to oblong cylindrical, and are usually somewhat 
curved; they occur unilaterally and are generally placed close 
27 * 
