AGAMIC RErRODUCTION AND REJUVENESCENCE 



139 



consist in the appearance of a new vacuole near the middle of the 

 body and the development of a band of peristomial cilia (Fig. 44), 



mg. 



Figs. 44-47. — Four stages of division in Slcntor: the margin of both old and new 

 peristomes is indicated by a heavy line; the separation of the new vacuole, r', from the 

 old, V, and the changes in shape of the meganucleus, mg, are also indicated After 

 Johnson, '93. 



