x LIST OF ILLUSTRATIONS 



XXIV. Various stages in the life cycle of Entamosba tetragena. 



(After Viereck.) 188 



XXV. Vegetative forms of Entamceba tetragena. (After Viereck.) 198 



XXVI. Encysted forms of Amoeba Umax 198 



XXVII. Various stages in the life history of Entamceba minuta. 



(After Elmassian.) 206 



XXVIII. Diagram of the life cycle of Paramoeba hominis 220 



XXIX. Amoebic, cystic, and flagellate stages of Paramoeba hominis. 



(Craig.) 226 



XXX. Entamoeba buccalis. (After Hartmann.) 232 



