Rhabdonia tenera , Ag. 
Fusion of the Antherozoid. 
Only a few cases of the fusion of the antherozoid were 
found, but in all of these the fusion occurred very near the 
tip of the trichogyne. Wherever trichogynes could be traced 
with certainty to the surface, they did not project much 
beyond the gelatinous coating of the frond (Fig. n). 
Trichogynes with attached antherozoids were found only 
in crushed preparations in which it was not possible to 
determine how far the trichogyne projected beyond the 
jelly. From the facts observed, it seems probable that 
the trichogyne does not project very much beyond the jelly, 
though this point is one of some uncertainty. 
CONJUGATING-TUBE. 
After fertilization, the contents of the trichophore lose all 
connexion with the contents of the trichogyne, being separated 
from them (Fig. 13) by a considerable interval filled by the 
gelatinous wall which encroaches on the lumen of the tricho- 
gyne, and finally completely fills it. The trichophore then 
puts out on one side a short projection filled with clear 
protoplasm, which grows into a long, delicate tube, tapering 
gradually towards the end (Fig. 13, ct). The contents of the 
tube are slightly granular and at first free from vacuoles, but 
these gradually make their appearance, being as a rule small 
and scattered. The tube grows towards the tip of the frond, 
keeping in the medulla and avoiding the cortex. Shortly 
after the tube begins to grow out from the trichophore, 
a second (Fig. 13), and often a third, makes its appearance, 
and grows in the same general direction as the first. It is 
less common to find only a single tube proceeding from the 
trichophore, but such cases are not difficult to find. These 
tubes, to which the name ‘ conjugating-tubes 7 will be applied, 
often reach a surprising length, and become very much 
attenuated towards the end. Occasionally a tube is found 
with one or more globose or ovoid swellings somewhere in 
its continuity. At a point opposite to an auxiliary cell, the 
