398 THE ZOOLOGIST. 
pheric cells, and awaits fertilization, in order afterwards to trans- 
form itself into the spore-forming apparatus, while the remaining 
19 to 25 peripheric cells become the case of the spore fruit through 
further divisions (see also Fig. 4, hh). The uppermost part of the 
female organ is the hair apparatus, which in Polysiphonia consists 
of the forked hair (gh), and the trichogynium (Fig. 3, t). The forked 
hair forms very early upon the young carpogonium, and indeed 
Fie. 3. 
long before the trichogynium is formed ; its position is always 
upon the true apex of the whole organ, although at times it 
stands apparently laterally from the apex. The duration of its 
existence, its presence at the time of fertilisation and its 
disappearance immediately afterwards, prove it to be an organ of 
some use in that process. The most essential and important part 
of the hair apparatus, however, is the trichogynium (¢ in Figs. 2 
and 3)—i.e., the receptive organ, which in Floridee has a similar 
