422 



BIOLOGY OF THE PROTOZOA 



Class I. Protomastigota. 

 Order 1. Protomonadida. 



Class II. Metamastigota. 

 Order 1. Hypermastigida. 



Family 1. Lophomonadidae, Grassi 



Family 2. 



Family 3. 



Family 4. 



Family 5. 



Family 6. 



Family 7. 



Family 8. 

 Order 2. Polymastigida. 



Sub-Order l.—Monokaryoma.stigina. 



Family 1. Callimastigidae. 



Family 2. 



Family 3. 



Family 4. 



Family 5. 



Family 6. 



Family 7. 



Family 8. 



Family 9. 

 Sub-Order 2. Dikaryomastigina. 

 Sub-Order 3. Polykaryomastigina . 



Family 1. Oxymonadidae. 



Family 2. Calonymphidae 



Hoplonymphidae, Light. 

 Kofoidiidae, Light. 

 Joeniidae, Grassi 

 Staurojoeniidae, Grassi. 

 Holomastigotidae, Grassi. 

 Trichonymphidae, Saville Kent. 

 Cyclonymphidae, Doflein. 



Dinenymphidae. 



Tetramitidae. 



Trichomonadidae. 



Devescovinidae. 



Spironemidae. 



Streblomastigidae. 



Chilomastigidae. 



Cochlosomidae. 



Class I. PROTOMASTIGOTA. 



Order PROTOMONADIDA. 



Key to Families. 



1. Flagellates always with pseudopodia in 



addition to flagella 1 Family Rhizomastigidae 



Flagellates without habitual pseudopodia 2 



2. With one or more posteriorly-directed 



flagella !* 



Flagella directed anteriorly 3 



