after Lcger, Patton, and Prowazek. I-III. Pref lagellate 
stage. IV-VIII. Flagellate stage : V. Young flagellate. 
VI. Flagellate beginning to divide, flagellum having already 
divided. VII. Advanced stage of division. VIII. Adult 
flagellate. IX-XI. Post-flagellate stage: IX. Degene- 
ration of flagellum. Xa. Post-flagellate stage completed by 
formation of gelatinous covering, containing double row of 
granular bodies (Prowazek). f.v. Flagellar vacuole, fc. Kineto- 
nucleus. s.t. Spiral chi-omophilous thread, tr. Trophonucleus. 
