464 



EVENINGS AT THE MICKOSCOPE. 



of which is therefore appropriated to each new made 

 animal. 



That the essential vitality of the creature resides 

 in this nucleus is shown by another and highly curious 

 mode of increase, namely, that which is effected by 

 encystion. Let us search the live-box carefully, for 

 amidst so great a profusion of Vorticelloe as we have 



on this Nitella, it will go hard if we do not find some 

 individuals in the encysted stage. 



Look at this elegant object. It resembles a trum- 



