Ill 



PLECTASCALES 



59 



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

 cells and parthenogenetically ; after Guilliermond. 



Fig. 10. Endomy , Magnusii Ludw.; a. i. antheridium and oogonium in contact; c. oogonium after 

 fusion of sexual nuclei; d. parthenogenetic ascus; Endomyces filniligtr Lindner; e. conjugation 

 between two neighbouring cells, al the end of the hypha is a group of young asci ; /. normal and 

 parthenogenetic asci ; after Guilliermond. 



