on Saprolegnieae. 345 
to be chosen by a man who has leisure for original research 
in the daytime. 
It is obvious that, as my organism is probably identical 
with Zopf’s larger amoebae, while his smaller ones are equiva- 
lent to Pringsheim’s spermamoebae, the foregoing study does 
not directly solve the question as to the fertilization or apo- 
gamy of the Saprolegnieae. Yet in so far as it proves that 
Pringsheim has confused a parasitic with a normal structure’ 
in the one case, it raises a presumption that he may have 
made the same mistake in the other; and I have a strong 
body of evidence from a totally different source tending to 
prove that his theory is erroneous. But this belongs of right 
to my nearly completed study of the protoplasmic structures 
of the Saprolegnieae and will be fully discussed therein. 
