DUDRESNYA. 
123 
The development of the sporogenous filaments, their fusion with 
auxiliary cells, and the origin of cystocarps from the fusion cells will 
be more readily understood from the diagram in Fig. 49. At a, after 
Ceres © an 
ao ee 
Ne cases 
Fic. 49.—Diagram showing origin of sporogenous filaments and their union with various auxiliary cells 
in Dudresnya coccinea ; parts drawn by means of short dashes indicate trichogyne and sporogenous 
filaments, while the dots indicate the auxiliary cells; 2,4, ¢, d, places where sporogenous filaments 
have united with auxiliary cells,—(After Oltmanns.) 
the sporogenous filament had fused with the auxiliary cell, the spo- 
rogenous nucleus divided, one daughter-nucleus remaining in the fusion 
cell, the other passing into the end of the filament which is cut off by 
