to plants which in part probably only reach a small size before winter. It must be 
supposed that the plants die in autumn or winter, entirely or with the exception of 
the basal portion which may survive the winter. New erect 
shoots may then grow out in spring from the basal remains of 
the erect shoots from the foregoing year (fig. 263 B). The spe- 
cies occurs in all the Danish waters except the North Sea where 
hitherto it has not been met with, and it has been found in depths 
from 7,5 to 24,5 meters, rarely in slighter depths. It grows on 
various Algæ e. g. Furcellaria and Polysiphonia elongata, further 
on Zostera, Flustra foliacea etc. The three kinds of organs of 
reproduction occur in different individuals. Once only a dispo- 
rangium-bearing individual was found bearing at the same time 
some few procarps (fig. 272). A general difference in size of the 
three kinds of individuals as that stated by ArescHouc (1850, 
p- 107), could not be ascertained. As a rule the plants are less 
branched in the inner Danish waters with feebler salinity, which 
is in accordance with the obser- 
vations of KyLın at the west coast 
of Sweden. But, with decreasing 
salinity the size of the plants 
rather increases, for while in the 
Skagerak and Kattegat it reaches 
So only a little over 2 cm, it is up 
Callithamnion Furcella. tO 3 and 4 cm in Store Belt and 
rie. From YY, June. the Baltic Sea, greatest near Born- 
SE ook eae holm. Specimens with procarps 
carp. 70:1. and cystocarps were frequently 
met with in the Kattegat together 
with sporangia-bearing ones, but in the inner waters 
south of the Samsø area sex organs were not found, 
while sporangia were frequently present. The sporangia 
were in most cases four-parted; disporangia have only 
been recorded from three localities in Sa, Lb and Sf. 
Some specimens from Skagerak are dubious. 
That is particularly the case with a specimen from Fig. 273. 
Hirshals (no. 7077, Hirshals lighthouse in S.E., 21/, Callithamnion Furcellarie. Aberrant 
. . . : 5 specimens from Løkken. 4A, a joint 
miles), differing by the cells not quite young contain- years two opposite branches. B—D, 
ing more than one nucleus; in other respects it agrees tetrasporangiferous branches. 70:1. 
with C. Furcellarie, but fully developed cystocarps were 
not present. The plant might possibly be of hybrid origin. The number of nuclei in 
the cells is otherwise, according to my experience, a very constant character. Other speci- 
mens were, as mentioned above, different in having bigger sporangia, up to 79 uw long, so 
