FIG. XXVII. Various stages in the life history of Entamoeba minuta. 

 (After Elmassian.) 1, vegetative forms which are motile, showing the dis- 

 tinction between the ecto- and endoplasm and the lack of a visible nucleus. 

 Note the markedly lobose pseudopodium; 2 and 5, Chlamydophrys ster- 

 coria, a parasite which is often found within Entamoeba minuta; 3, motile 

 and immotile forms of Entamceba minuta. Note lack of distinction between 

 the ecto- and endoplasm in the motionless forms; 4, young amoebae pro- 

 duced by schizogony; 6, vegetative form containing a parasite; 7, vegetative 

 form of Entamoeba coli; 8, encysted amoebae containing spore-like bodies; 

 9, encysted Entamoeba minuta, showing the appearance of the nucleus prior 

 to division; 10, encysted amoebae containing two other parasites which con- 

 tain spores; 11 and 12, encysted amoebae, showing division of the nucleus; 

 13, encysted Entamoeba coli, showing division of the nucleus into four parts, 

 one of which shows mitosis; 14, 15, and 16, encysted Entamceba minuta, 

 showing division of the nucleus into four daughter-nuclei; 17 and 18, encysted 

 Entamoeba coli, showing in 17 the four nuclear stage, two of the nuclei 

 undergoing mitosis, and in 18 the eight nuclear stage of this parasite. 



