80 Proceedings of Indiana Academy of Science 
Fig. 1. Zoosporangium of Vaucheria sessilis with two branches x 300. 
wall. Neither branch was separated from the supporting cell by a 
wall, as will be seen from the figure, nor later on, although the speci- 
men was kept and observed under as favorable conditions as was pos- 
sible. It will be noticed, furthermore, from the figure that the above- 
mentioned branches extend at right angles from the cell. This recalls 
the way previously described in this paper in which the branches which 
are to become or to carry the sex organs in this plant arise. 
