148 
In the lower (older) part of the colony the threads appear to be 
less numerous, whereas in the upper layers they are exceedingly 
numerous and form an extremely close and intricate tissue. 
As stated by Dr. Rosenvinge it is impossible to decide 
from the preserved material, whether the cells are coloured or 
uncoloured in life, and accordingly it is impossible to decide to 
which genus the organism belongs. I wouid be inclined to think 
that they are uncoloured, in which case it would probably belong 
to the genus Chlamydothrix Migula. In view of the fact that it 
is impossible to give a definite answer to the question of the genus 
it seems to me better to omit giving a name to the organism — 
the more so, as I do not feel competent to give a new name to aå 
Bacterium,; even if it seems beyond doubt that it is a new species. 
I shall feel content with calling the attention of Botanists to this 
interesting organism and its peculiar life conditions. 
In conclusion I beg Dr. Kolderup Rosenvinge to receive 
my sincerest thanks for his kind assistance. Without his help I 
would, of course, not have ventured to publish this note. To him 
belongs the real scientific investigation of the organism; I have 
done only, what everybody could do without any special knowledge. 
The p sn represents the largest spec preserved. Side view. Åt the right 
side the figure is ve part of tre rn er slartern which ken attached the 
olony to the rock. (Natural size). 
29,—3. — 1909. 
