91 



tents of three cells. In this case the Zygospore is not apparently nuich 

 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 tlie specimens, four filaments were found con- 

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

 conjugating in the usual way, but others conjugated with each other in 

 whatever filaments were near them without regard to regularity. They 

 formed quite a mat of filament. 



Some specimens were noticed each of wliose cells in conjugating put 

 out two conjugating tuhcs {ly the neigliboring cell. Only one of these tubes, 

 however, seemed to l>e comjileted and to serve as a channel for the transfer 

 of one cell to the other. 



