28 



COMPARATIVE MORPHOLOGY OF FUNGI 



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m Fig. 17— Woronina polycystis. a, Hyphal tip of Saprolegnia with 5 cells each contain- 

 ing a sporangia! sorus of the parasite, the uppermost about to discharge; b, Cystosorus, c in 

 each of lower cells, a sporangiosorus, s, in the upper cells, c. Rozella septigena. Hyphal 

 tip . o -Saproleama with 5 cells each entirely filled with a cylindrical zoosporangium. (a X 

 200, b and c X 300; after Cornu.) 



