144 Wager —Observations on the Structure 
The antheridia send out fertilising tubes, swollen at the ends, 
which pass to one side of the oosphere, come into close contact 
with it, and appear to open into it by a small aperture. The 
passage of a nucleus from the antheridium into the oosphere 
has not been directly observed, but it is probable that fertilisa- 
tion does take place, as two nuclei have been seen in the 
oosphere at about the time when a nucleus or nuclei from the 
antheridium appear to pass over the fertilising tube. 
The nuclei of the mycelium divide in a similar manner to 
those in the oogonium, but they do not become so large nor 
exhibit the details so clearly. 
The gonidia or zoosporangia contain numerous nuclei, dif- 
fering in structure from the nuclei in the other parts of the 
fungus. They consist of a central mass of chromatin, sur- 
rounded by a layer of nucleoplasm, with a firm outline. 
They are spherical or slightly oval bodies, a little larger than 
the nuclei of the mycelium. 
