TWO YOUNG NATURALISTS. 215 



myriads in filthy water ; VorticellaB, posing their 

 globose bodies and open mouth, at the end of a long 

 twisted stalk, something after the fashion of a spiral 

 spring. 



For each demonstration, Le'on had recourse to a 



a 



GBOUP OF MONADS Enchcli/s pupa. 



(Monas crepitsculum). 



new receptacle for his drop of water, and this was 



noticed by his cousin who remarked 



"Do you, then, keep all these kinds separately? " 

 " It is easier to study them when they are so. 



Different sorts of infusions or decoctions are more 



B 



VEGETABLE INFTTSOBIAN ( VoloX 

 A, THE OBGANISM J B, DETACHED ZOOSPORE8. 



specially resorted to by certain animalcules. For 

 instance, one finds more particularly 



" Volvox and Yorticellee in infusions of hemp-seed. 



" The species of Enchelys in infusions of hay or 



