248 
mains of the free ends of the filaments are still visible at the border of the ostiole. 
On the other hand it is certain that a crown is not always developed, for ripe and 
emptied cystocarpic conceptacles may be found in which the structure of the ostiole 
WE 
Fig. 167. 
Melobesia limitata. Vertical sections of female conceptacles. 
with unfertilized carpogonia. 
with well developed crown consisting of articulated filaments. 
veloped eystocarpie conceptacle in the stage of emptying; the crown has 
4, young stage 
B, fully developed cystocarpic conceplacle 
C, fully de- 
B 650 :1. 
perhaps been thrown off. From Amtoft Rev. A, C, D 350:1. 
agrees exactly with that of 
the young conceptacles 
shown in fig. 167 A, and 
which show no trace of a 
shed crown. 
As will be seen from 
the above, this species dif- 
fers from M. Lejolisii, besides 
the characters named by 
FosLıE, principally by the 
thicker roof of the sporan- 
gial and cystocarpic con- 
ceptacles, and by the cen- 
tral part of the roof con- 
sisting of long converging 
articulated filaments, some- 
times projecting outwards 
as a crown, and further by 
the structure of the antheri- 
dial conceptacles, the sper- 
matia being not produced 
at the end of long sterig- 
mata. 
I refer to this species 
the specimens from Nykg- 
bing, Mors referred by 
FosLıE with doubt to Me- 
lobesia farinosa f. borealis 
(Foslie, Remarks, p. 98). 
Foslie did not find any he- 
terocysts, but I found some 
intercalary trichocytes with 
or without cortical cells, as 
described above, thus different from those of M. farinosa, in which they are terminal. 
All the specimens referred to this species were growing on Algæ, particularly on 
Fucus vesiculosus, thus all the specimens found in the Limfjord, otherwise on Chondrus 
crispus, Rhodymenia palmata and Laminaria digitata. In the Limfjord it was always 
found growing together with Lithophyllum macrocarpum. Sporangia, antheridia and 
cystocarps were met with in August and September. The species is certainly annual. 
