222 The Sarcodina 



Fig. 5. 15. A-J. Pseudospora parasitica Cienkowski: A, B. Young and older 

 amoeboid stages. C, D. Formation of "zoocyst." E, F. Production of uni- 

 nucleate amoebae and their escape from the cyst. G. An amoeboid "gamete." 

 H, Stage supposedly produced by fusion of two gametes. I. Nuclear fusion is 

 said to have occurred in the "zygote." J. A "sporocyst" has developed from 

 the encysted zygote; schematic (after Schussnig). K, L. Pseudospora rovig- 

 nensis Schussnig, amoeboid and flagellate stages; schematic (after S.). M-O. 

 Pseudospora volvocis Cienkowski, flagellate, amoeboid, and encysted stages; 

 xlHO approx. (after Roskin). 



and syngamy occurs (Fig. 5. 15, G-I). The supposed zygote promptly en- 

 cysts. Within the "zoocyst," a second membrane ("sporocyst") is secreted to 

 produce a resting cyst (Fig. 5. 15, J). Flagellate "swarm-cells" and small 

 amoebae also have been reported in P. rovignensis (135), P. eudorini, and 

 P. volvocis (127). 



The taxonomic position of the family is still uncertain and it has been 



