AGAMIC REPRODUCTION 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), 



47 



FIGS. 44-47. Four stages of division in Stentor: the margin of both old and new 

 I icristomes is indicated by a heavy line; the separation of the new vacuole, v f , from the 

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

 Johnson, '93. 



