ED RE 
In other specimens the frond is much narrower than in the just named ones; 
the breadth of the frond is, indeed, variable, but 1—2 mm broad parts of the 
frond with feeble incisions as 
in the typical Ph. Bangü do 
not occur. LYNGBYE named 
this form f.tenuior and numer- 
ous specimens from Hofmans- 
gave are to be found in the 
herbarium. I have also found 
it in numerous localities and 
it is easy to distinguish from 
the broader form, and it is 
remarkable that f. fenuior is 
the only form occurring in 
the southern part of Lille 
Belt, in Store Belt and the 
western Baltic Sea. On the 
other hand it occurs together 
Fig. 527. 
Phyllophora epiphylla f. Bangii, tenuior. Dredged south of Ærø, 7 m. 2:1. 
with the broad form in several localities in the waters north of Fyn. In the Western 
Baltic Sea it occurred in considerable quantities, in some localities together with 
other loose Algæ. Some of the specimens growing here produced shoots of a differ- 
ent character, being destitute of the numerous warts or lacinule but having long 
diverging branches with even borders. (Fig. 528 C). As these shoots are continuous 
with the usual crenulated form, their connexion with f. fenuior is evident notwith- 
Fig. 528. 
Phyllophora epiphylla f. Bangii, thinner form (f. tenuior Lyngb.). 
A with an expansion, C producing shoots without lacinulæ. A and 
B Hofmansgave; C, south of Æro. A and C 3:1, B 2:1. 
standing the different shape. Like- 
wise, the f. tenuis must be supposed 
to arise from the thinner shoots of 
the typical Ph. Bangü. F. tenuior 
does not branch by proliferations 
and is thus very different from 
the typical Ph. epiphylla. 
This species has thus the 
power of keeping alive in a loose 
condition, the shape of the frond 
being gradually much altered. In 
localities situated near the boundary 
of the genuine species specimens 
occur that are only different by the 
frond being partly more or less 
incised. In the typical Ph. Bangü 
he border is incised in its whole length, some parts of the frond being, however, 
broader, 1—2 mm broad, and only minutely crenulated; branching by proliferations 
