422 INFUSORIA. 
Visrio, Mull. 
Where the body is round and slender like a bit of thread. 
It is to this genus that belong the 
V. clutinis et aceti, or the pretended Eels that are seen in vi- 
negar and paste. Those that inhabit the former are frequently 
perceptible to the naked eye. Itis asserted that they change 
their skin, consist of two sexes, produce living young ones in 
summer, and eggs in autumn. Freezing will not kill them. 
The others make their appearance in diluted paste. 
Encueuis, Mull. 
Where the body is oblong, softer, and less determined than that of a 
Vibrio. In 
CycLipIUM 
It is flat and oval. In “ 
PARAMECIUM 
It is flat and oblong. In Z 
~~ KoLpopa 
It is flat and sinuous. In 
GoNIUM 
It is fat and angular. And in 
BursARIaA 
war 
Hollow like a sac. 
