1335 
h Fig. 257. 
Callithamnion roseum. Procarps before and after fertilisation. a! and a? auxiliary mother-cells, or in D and E auxi- 
liary cells. a? that from which the carpogonial branch is given off. 1, 2,3, c, the cells of the carpogonial branch. 
In A a? is wanting. In C fertilisation has taken place;7s sporogenous cell before fusion with the auxiliary cell; under 
it the rest of the carpogonium. In D and E the auxiliary cells have been cut off, except a? in D; b the stalk cells 
of the auxiliary cells. The three cells under a! seem to be the young gonimoblast. B 270 : 1, the others 350 : 1. 
short branches prineipally on its convex side, but on the flanks and the upper 
side too, consisting of one or few cells and producing numerous antheridia which 
organs may also project directly from the cells of the main axis. 
The procarps are nearly opposite to the branch projecting from the same cell. 
The auxiliary mother-cell (a!) from 
which the carpogonial branch is pro- 
duced is situated very near the branch, 
the other one (a?) is somewhat removed 
from its other side (fig. 257). The car- 
pogonial branch consists of four cells, 
the second of which is situated obliquely 
over the first, the carpogonium exactly 
over the third (fig. 257). The one auxi- 
liary mother-cell (a?) may sometimes 
be wanting (fig. 256). The cystocarps 
are composed of two ovate gonimoblasts; 
Fig. 258. 
0 o 3 Callithamnion roseum. Cystocarps, A young, B almost ripe. 
their outline may be more or less irre- A 260 :1. B 150 :1. 
