RHODOPHYCE, OR FLORIDEA 223, 
Spheevrococceee. 
Nearly all the members of this family have much 
branched fronds without foliar expansions, the 
branches being frequently robust and of dense 
texture. The gonimoblast is formed within the 
Fic. 70.—a, Phacelocarpus Labillardierit natural size; 6, cystocarp of 
Gracilaria confervoides highly magnified. (After Thuret and Bornet.) 
thallus, and produces its cystocarp within a wall 
formed of the peripheral thallus tissue which arches 
outwards and has an opening at the apex for the 
escape of the carpospores. The fruits consequently 
look like semiglobular swellings on the branches.: 
Within this fruit-cavity and at its base there is 
formed a placenta from which the spores are pro- 
duced, and its surface is free from the over-arching 
