91 



tents of three cells. In this case the Zygospore Is not apparently much 

 larger than where two cells fuse, so that the decrease of turgidity causing 

 the contraction of the protoplast is in this case very great. 



Figure 4. 



In still another lot of the sjieciniens, four filaments were found con- 

 jugating with one another as in the last case. Most of the cells were 

 conjugating in the usual waj', but others conjugated with each otlier in 

 whatever fllanients were near them without regard to regularity. They 

 formed quite a mat of filament. 



Some specimens were noticed each of whose cells in conjugating put 

 out two conjugating tubes to the neighboring cell. Only one of these tubes, 

 however, seemed to be completed and to serve as a channel for the transfer 

 of one cell to the other. 



