12 Nr. 4. L. KoLperup ROSENVINGE: 
lower part of the flat thallus of the female plants. The 
carpogonial branch is three-celled, borne on a large bearing 
Fig. 2. Phyllophora membranifolia. A, carpogonial branch. B, procarp. 
a, auxiliary cell, 1, 2, c carpogonial branch. C, the auxiliary cell is pluri- 
nuclear. D, auxiliary cell pushing out numerous gonimoblast filaments. 
A 625:1. B—D 390:1. 2 
cell that becomes an auxiliary cell. The carpogonium has 
a prolongation downwards which is laterally inserted by a 
Fig. 3. Phyllophora membranifolia. 
Portion of transverse section of 
ripe cystocarp. November. 390: 1. 
pit on the second cell of the 
carpogonial branch (fig. 2 A, 
B). A spermatium seems to 
have been attached to the 
trichogyne in fig. 2 A. The 
fertilization and the transfer 
of the sporogenous nucleus 
to the auxiliary cell have not 
been observed, but the devel- 
opment of the latter is shown 
in fig. 2, C, D. While at first 
it contains one nucleus, it 
becomes plurinuclear and 
pushes out prolongations, first 
from the under side, later from 
all sides, which develop into 
