598 



A Q LJA TIC PH YCO M YCETES 



Fig. 37. Megachytrium and Septochytrium 



A-B. Megachytrium westonii Sparrow on Elodea: A, portion of thallus 

 bearing zoosporangia, swellings and resting spores, on Elodea leaf; B, portion 

 of thallus bearing two resting spores; lower one has germinated and produced 

 an operculate zoosporangium. C. Septochytrium variabile Berdan, portion of 

 mature thallus showing large central primary operculate zoosporangium and 

 swellings and small secondary sporangia. 



(A-B, after Sparrow, 1933a; C, after Berdan. 1939) 



