199 



suffice to indicate to you the nature and process of 

 regeneration. 



We have many kinds of regeneration ; we may 

 have that of the single cell or that of the whole 

 organism. Let us consider first unicellular regener- 

 ation, and accordingly we pass to the examination of 



B 



FlG. 67. Stentor. 



the next of our slides, which represents a creature of 

 the kind called Stentor, Fig. 67. It is a single cell. 

 The nucleus of the cell has a singular form, for it con- 

 sists of nine bead-like enlargements, with the parts 

 between constricted to mere delicate connecting 



