rou3 progeny. In fome inftances it is found of the 
length of the tenth of an inch : but its general fize 
is far lefs. The plate reprefents a group of thefe 
animalcules moderately magnified, and in fuch a 
manner as to exhibit the various particulars of Ihape, 
pofturc, tranfparency, comparative fize, &c. Ani¬ 
malcules of a fimilar appearance are fometimes found 
in vinegar, and have been generally confidered as 
conftituting a variety rather than a diftind fpecies. 
