RHODOPHYCE, OR FLORIDEH 215 
neighbouring cells of its own branch, generally one 
larger than itself, and thus obtains more material 
for the first development of 
the gonimoblast. 
The Gelidiea embrace a con- 
siderable number of genera of 
very diverse stature and struc- ) 
ture of thallus, ranging from 
the minute epiphyte (para- ee 
site ?) Harveyella, through 
slender and graceful forms 
like Wrangelia, to the stout- 
branched fronds of Gelidiwm, 
Suhria, and Pterocladia. b 
The Geographical Distribu- 
tion is mainly in the north N iN I 
and south temperate zones, yoo x) y 
though the family is repre- s AN p 
sented in all seas. Harveyella, 
Atractophora, Naccaria, Celt- : 
dium, and FPterocladia are 
British, and with a more or NN (gs 
less wide range in northern 
seas; (elidiwm however being of Viz 
fairly general distribution, and y 
Pterocladia typically represent- 5. 65s, carpogonium of 
ed inthe Southern Ocean. Cau- ee 
lacanthus is a Mediterranean 
form, and Porphyroglossum is tropical (Java). Bin- 
derella, Wrangelia, Suhria, Acropeltis, and Ptilophora 
are either confined to southern seas or at least (as 
Wrangelia) find their finest development in them. 
