1066 



AQUATIC PHYCOMYCETES 



Fig. 91. Ancylistes 



A-B. Ancylistes closterii Pfitzer in Closterium sp.: A, resting spores in 



portion of Closterium cell; B, hyphal plant showing extramatrical hyphae one 



of which has encircled another host cell and formed an appressorium. C-F. 



Ancylistes netrii Couch, in Netrium sp.: C, portion of a host cell showing two 



