FIG. V. Photomicrograph of Entamceba coli and Entamceba histo- 

 lytica. (After Jiirgens.) The amceba at 1 is Entamceba coli, while the 

 other amoebae in the photograph are all examples of Entamceba histolytica. 

 Note the well-defined nucleus in Entamceba coli and the absence of a distinct 

 nucleus in Entamceba histolytica. Note the clear ectoplasm in Entamceba 

 histolytica. 



FIG. VI. Multiplication by simple division in Entamceba coli. (Cfraig.) 

 A, division of the chromatin within the nucleus into several clumps arranged 

 upon the inside of the nuclear membrane; B, formation of a nuclear spindle, 

 showing that the division of the nucleus is mitotic in character; C and Z>, 

 division of the nucleus into two portions; E, division of the nucleus and 

 partial division of the cytoplasm of the amoeba; F, complete division of the 

 parasite and the production of two amoebae. 



