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type E. Thus, I think that type C after ingesting food under- 

 goes nucleus division. Indivi duals of type E in unnormal 

 conditions brealc up into a rosette of balls, and produce type 

 F. But usually they feed intensely, divide, become smaller 

 and give origin to the type D; the latter are filled with food 

 like the preceding, and are in the state of division. However, 

 in dividing they do not produce small undulating membranes, 

 but large ones of the type A and B. After division is finished, 

 the individuals 1), having become uninucleate, are freed from 

 food, and are thus transformed either into type A or B, which 

 depends on the maintenance of the spindle in them (in the 

 shape of an axostyle), or on its absorption. The further fate 

 of individuals A and B remains unknown, but is it possible 

 that these forms are preparatory to sexual reproduction (the 

 total absence of food in them speaks in favour of that view). 



