Fig. 88, 
Furcellaria fastigiata. Section of young cy- 
stocarp. At right several carpogonia. s, spo- 
rogenous filaments. The cells of the young 
eystocarp contain minute starch grains while 
those of the surrounding cells are much 
larger. August. (200:1). 
I have also in the same specimens observed the 
production of small cells at the under end of the 
large cells of the inner cortex, resembling the forma- 
tion of secondary pits in the Rhodomelaceæ, but 
what their significance may be I do not know. 
The cortical cells situated outside the auxiliary 
cells have richer contents and stain deeper with 
hæmatoxyline than the others, forming thus a 
darker stripe towards the surface (fig. 86 B). The 
ripe cystocarp appears as a globular heap of car- 
pospore cells, grouped around the auxiliary cell 
or containing in the centre also a few other sterile 
cells. The particular gonimolobes are usually not 
distinguishable. At the periphery of the cystocarp 
some long cells are frequently found forming an 
incomplete envelopé around it, as shown by ARE- 
scHouG and Caspary, Il. cc. At the time of ripe- 
ning a pore is formed in the cortex through which 
the spores are exhausted. This pore arises by 
destruction of the cells of the darker stripe mentioned above. The fructiferous part 
of the female fronds is more or less inflated, almost as in the sporangia-bearing 
ones, but the upper part of the fronds frequently remains sterile; this part may be 
1 to 2 cm long and branched (fig. 83 C). 
Germinating spores of what must be supposed to be Furcellaria fastigiata are 
frequently met with on various Alge, as Delesseria, Phyllophora a.o. They are at 
first hemispherical, and are divided by rather regular anticlinal and periclinal walls 
A 
Fig. 89. 
without changing form, but increasing 
in size (fig. 89 A). Later on, a cylindric 
upright shoot of the typical structure 
is produced from this hemispherical 
body, the shoot being a little narrower 
as the basal part (fig. 89 B). These 
shoots later branch and produce rhi- 
zomes at their base. 
This Alga is one of the com- 
monest and most widely distributed 
in the Danish waters. It attains its 
highest degree of development in the 
Kattegat and the Belts, where it be- 
comes up to 28cm high. In the 
Furcellaria fastigiata. A, germinating spores, seen from above western Baltic it attains a length of 
and from the side. B, older stage showing a cylindric shoot 
growing out from the hemispherial body. 
24,5 cm, whereas at Bornholm I have 
