66 



Marvels of Pond- Life. 



These vibriones are probably members of the vegetable 

 world, and they always appear when animal matter 

 undergoes putrefaction. 



M. Pasteur has brought forward elaborate experiments 

 to show that the development of the yeast plant is an 

 act correlative to alcoholic fermentation, and in like 

 manner the growth of vibriones may stand in correlation 

 to putrefactive decomposition. 



Ehrenberg considered them animals, and fancied he 



A, Euplotes (patella); B, side view of ditto; c, stylonichia. 



detected in them a plurality of stomachs; but the 

 vegetable theory is the more probable, at any rate of the 

 species under our notice, which is often seen, though 

 not always so minute. 



At this time two interesting animalcules were very 

 plentiful— the Euplotes patella, and Stylonichia, both 

 remarkable as exhibiting an advance in organization, 

 which approximates them to the higher animals. In 

 addition to cilia they possess styles, which take the 



