224 
LECTURE XU. 
. tator the magnificent scene in Mr. Walker’s 
Eidouranion, representing numerous worlds re- 
volving in various directions. 
In a genus called Vibrio, from its vibrating or 
serpentine form and motion, we meet with the 
largest of all the Animalcular tribe; viz. the Vibrio 
Anguillula or Eel-Vibrio, of which one variety inha- 
bits acid paste made of flower and water, or such 
as is used for the common purposes of bookbinding, 
and the other variety is often found in common 
vinegar. The paste Vibrio is distinctly visible to 
a good eye without a glass, and when full grown 
measures the tenth of an inch in length: it is vivi- 
parous, and frequently produces a tribe of young. 
Its general appearance when magnified is that of an 
Eel. This animalcule, from its size, and the ease 
with which it may at all times be kept and observed, 
is peculiarly interesting. It generally swarms on 
the surface of the paste, and often coats the sides 
of the vessel in which it is kept, often forming a 
kind of ramifications, resembling the branched ap- 
pearance of frost on a window: this is particularly 
observable in rainy weather. 
The genus Cyclidium is distinguished by its 
oval shape, and is among the smallest of Animal- 
