354 Phillips . — On the Development of 
(PL XVII, Fig. 6 ). The trichogyne has by the time dis- 
appeared. The wall of the auxiliary cell is already highly 
mucilaginous, and the filaments lining the cystocarpic cavity 
are beginning to be pushed back. A later stage (PI. XVII, 
Fig. 7 ) shows the auxiliary cell grown out into a tier of 
cells, branching on all sides at each tier. The terminal tufts 
of gonimoblast-filaments (gonimolobes) seem to mature first ; 
those near the base, at any rate, seem less vigorously de- 
veloped than those near the apex. The pericarp has now 
bulged out into a globular mass, and the cystocarp has 
become more or less external on the thallus. At the same 
time, the looser lining layer has assumed the appearance of 
a mass of attenuated filaments radiating from the base. Later 
an apical pore arises by dissolution of the wall, and the 
maturer carpospores escape. 
In the circumstance that the auxiliary cell is derived from 
the mother-cell of the carpogonial branch, there is a clear 
resemblance to the Rhodomelaceae. There are, however, no 
sterile threads comparable with those of Rhodomelaceae and 
Bonnemaisonia. Other Rhodymeniaceae are, however, de- 
scribed as forming the auxiliary cell from cells contiguous 
to the mother- cell of the carpogonial branch, and even as 
forming more than one auxiliary cell (Hauptfleisch, ’92). 
Calleblepharis ciliata, Kiitz. 
As this plant occurs commonly on our shores, it seemed 
to rite a readily accessible species of Sphaerococcaceae in 
which to follow the development of the cystocarp. 
The procarps occur in great numbers along the margins 
of the ‘cilia,’ from which the plant derives its name. When 
one of these matures into a cystocarp, the ‘ cilium ’ becomes 
swollen, sometimes symmetrically, more often obliquely, so 
as to throw the apex over to one side. The cystocarp does 
not emerge as a globular mass upon the surface, but remains 
at best a broad-based protuberance. 
