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 peris tomial cilia (Fig. 44), 



mg- 



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

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

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

 Johnson, '93. 



