1 82 MOKPHOLOGY. 



391. Zoogonidia of saprolegnia, — The sporangium opens at 



Fig. 1 06. 

 Branch of saprolegnia showing oogonia with oospores, eggs matured parthenogenetically. 



the end, and the zoogonidia swirl out and swim around for a 

 short time, when they come to rest. With a good magnifying 



Fig. i',7- 

 Powny mildew of grape (Plasmnpora viti- 

 rnla), siiowingtuft of gonidiopliores bearing 

 gonidia, also intercellular mycelium. (After 

 MiUardet.) 



Fig. 19S. 

 Phytophtliora infesUns showing pe- 

 culiar branches; gonidia beluw. 



p(.iwtT the two cilia 011 the en<l ma)' be seen, or we may make 



