Explanation of PI. III. 



b'emale receptacles aiul sporeliug development of Cißtoj)hi/Uii)ii 

 sisi/ijibriniiles. All figures were drawn with the aid of camera lucida 

 from living materials. Magnifications : figs. 1 and 2. ca. 10 times ; 

 figs. 2-0 ca. 170 times. 



Fig. 1. Female receptacle in the first oogonium liherations. 

 Paraphyses protruding from the conceptacle and forming a mass 

 resembling a mycelium. 



Fig. 2. After tlie oogonia discharged in the first liberation 

 had dropped oô'. 



Fig. 3. Oogonium with eight nuclei. 



Fig. 4. Some of the eight nuclei in the oogonium about to 

 degenerate. 



Fig. 5. "The first segmentation. 



Fig. 6. The second segmentation. 



Fiö"S. 7-9. Later stages of the sporeling development. 



i 



