FLAGELLATE PARASITE IIERI'ETOMONAS 



175 



7- .\ 



..^_ Pre-Fia^ellate Stage 



T^" 



Ml' 



I\ %,/V 



Fig. 77. Diagram of the life-cycle of Herpetomonas vmscae-domesticae Burnett. 

 An-angement chiefly after Patton ; figures after Leger, Patton, and Prowazek. 

 I — III. Pre-flagellate stage. IV — VIII. Flagellate stage: V. Young flagel- 

 late. VI. Flagellate beginning to divide, flagellum having already divided. 

 VII. Advanced stage of division. VIII. Adult flagellate. IX — XI. Post- 

 flagellate stage: IX. Degeneration of flagellum. Xa. Post-flagellate stage 

 completed by formation of gelatinous covering, containing double row of 

 granular bodies (Prowazek). f.v. Flagellar vacuole. k. Kinetonucleus. 

 s.t. Spiral chromophilous thread. tr. Trophonucleus. 



