ENDAM(EBA BLATT^ 



237 



wall has formed till large numbers of nuclei occur, while in E. coli nuclear 

 multiplication begins only after encystment, and there are rarely more 

 than eight nuclei. In the case of E. coli the fate of the amoebae which 

 emerge from the cyst in the newhost is not known, and it is possible that 





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Fig. 110. — Endamceha hlathe from the Intestine of the ('ockkoacu ( x 600). 

 (After Mercier, 1910.) 



1. Amoeba with characteristic nucleus and many vacuolic inclusions. 

 •1. Amoeba after division of nucleus. 3. Amoeba showing final stage of division. 



4-(). Multiplication of nuclei in preparation for encystment. 

 7-9. Encysted forms; nuclei multiplying. 

 10. Escape of multinucleated amoeba from cyst. 

 11-12. Production of gametes from Tuultinuclcated amoeba. l.''-lo. Free gametes. 



10-18. Stage.s in unif)n of gametes. iy--3. Stages in growth of zygote. 



