OF THE INTESTINAL TRACT. 205 



Motility. Entamceba minuta is actively motile, 

 the pseudopodia being composed entirely of ecto- 

 plasm. It is only in the moving organism that the 

 ectoplasm can be distinguished and it resembles that 

 of histolytica and tetragena, being clear and glass- 

 like in appearance. The pseudopodia are generally 

 short and blunt, but may sometimes be finger-shaped, 

 especially in the more actively motile amoebae. 



Reproduction. The reproductive processes in 

 this species are very similar to those occurring in 

 Entamceba tetragena, consisting of simple division, 

 schizogony, and reproduction within a cyst. 



Simple division is preceded by the mitotic division 

 of the nucleus after which the cytoplasm divides, 

 two amcebge being produced. The process is similar 

 to that in other amoebse, and has been described in 

 preceding sections. 



Schizogony results in the division of the organism 

 into four young amoeba?. It is initiated by the 

 division of the nucleus by mitosis into four portions 

 and is completed by the division of the cytoplasm. 

 During the division of the nucleus a well marked 

 equatorial plate is frequently observed. 



Reproduction within a cyst is initiated by the ex- 

 trusion from the organism of all foreign particles, 

 the cytoplasm becoming clear in appearance, while 

 the nucleus increases in size to twice its former 



