360 



AQUATIC PHYCOMYCETES 



, 





"'•'V--:. 

 



Fig. 21. Phlyctidiaceae 



A Blyttiomyces spinulosus (Blytt) Bartsch, empty sporangium on zygo- 

 spore of Spirogyra; spiny sporangium is epibiotic on surface of host game- 

 tangium; apiculus is terminal, discharge pore lateral; apophysis is within 

 zygospore of host and gives rise at its base to rhizoidal system; resting spore 

 isendobiotic. B-E.Podochytriumemmanuelense (Sparr.) Sparrow and Paterson 

 on Melosira: B-C, E, maturing sporangia on surface of host; main body is pro- 

 duced as outgrowth from cyst of infecting zoospore; Z), epibiotic resting spores. 

 F-G. Saccomyces endogenus (Nowak.) Sparrow on Euglena: F, prospo- 

 rangium on outer surface of encysted host; sporangium appears as broad 

 lateral outgrowth; G, release of zoospores upon bursting of sporangium wall; 

 cndobiotic apophysis and broad finger-like lobes of haustorial system are 

 apparent within the Euglena. H-J. Coralliochytrium scherffelii Domjan on 

 Zygnema: H, group of sporangia with adherent cysts on surface of host cell; 

 I, base of sporangium with endobiotic apophysis and stalk at tip of which 

 is gnarled digitate absorbing organ; /, epibiotic resting spore on surface of 

 host. K. Podochytrium lanceolatum Sparrow on cell of Melosira. L. Podo- 



