OF SOUTH AUSTRALIA. 
195 
The colour of this species is often bright-red. It grows 
in water five or more fathoms deep, and is best secured by 
dredging. 
Fig. 62 . — Gloioderma tasmanica. 
^/y/ZL Y R HOZD Y/T7 ZZ /V //? C/Y/E 
Subfamily Rhodymenieae (J. Agardh) Schmitz. 
Frond terete or flat, erect. Cellular or filamentose-cellular structure. 
Cavity of the cystocarp containing only the residue of a restricted plexus. 
Gonimoblast lobes closely confluent. Placenta often minute. 
CONSPECTUS OF THE GENERA. 
A. — Frond solid. 
a. Tetrasporangia triangularly divided Ilymenocladia 
J. Agardh. 
b. Tetrasporangia zonatelv divided Stictosporum 
(Harv.) Schmitz. 
c. Tetrasporangia cruciately divided, frond flattened. 
1. Cystocarps scattered over the surface of 
the frond. Structure cellular Rhodymenia. 
Greville. 
2. Cystocarps evolved in leaves prolificating 
from the surface of the frond Epymenia 
Kutzing. 
3. Cystocarps scattered over the surface of the 
frond. Structure cellular-filamentous . . Sebdenia Berth. 
