396 



AQUATIC PHYCOMYCETES 



Fig. 24. Entophlyctoideae 



A-B. Aphanistis oedogoniorwn Sorokin in Oedogonium sp.: A, plants bear- 

 ing sporangia in oogonia of host; a group of zoospores is shown to right of 

 filament; B, different shapes assumed by zoosporangia. C. Mitochytridium 

 ramosum Dangeard in Docidium sp., portion of desmid cell with parts of 

 several sporangia. D. Rhizosiphon crassum Scherffel in filament of Filarszkya 

 sp., mature sporangium with already opened discharge tube, resting laterally 

 on broad prosporangium. E-G. Phlyctorhiza endogena Hanson in insect in- 

 tegument: E, early stage in vesication of rhizoidal system to produce sporan- 

 gia! rudiment, showing relationship between zoospore cyst, rhizoids and rudi- 

 ment; F, discharge of zoospores of a mature sporangium; G, tuberculate 

 resting spore with vesiculate rhizoids. 



(A-B, Sorokin, 1883; C, after Couch, 1935c; D, Scherffel, 1926a; E-G, 

 Hanson, 1946b) 



