'^m/':< 







Protozoan Types 



1, Paramcecium; 2, Coleps; 3, Didinium feeding on ParanKTN'ium; 

 4, Clathrulina; 5, a monad; 6, Volvox; 7, Stentor; S, Htylonichia; 

 9, Peridinium; 10, Ceratium. 



Figs. 2 and 8 after Conn; 4 after Leidy; 5 and 7 after Edmondson; 

 9 modified from Schilling after Huitfeld-Kaas; and 10 after Laukcster; 

 the rest original; 3 from a j)reparation by Powers. 



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