Ill] 



PLECTASCALES 



59 



Fig. 19. Eremascus fertilis Stoppel; stages in the formation of the ascus, both by fusion of two 

 cells and parthenogenetically ; after Guilliermond. 



Fig. 20. Endomyces Magnusii Ludw.; a. b. antheridium and oogonmm in contact; c. oogomum after 

 fusion of sexual nuclei; d. parthenogenetic ascus; Endomyces fibuhger L.ndner; e. coi ugatio 

 between two neighbouring cells, at the end of the hypha is a group of young asci, / no 

 parthenogenetic asci; after Guilliermond. 



