ao SEMINAL VERMICULI Ili 
wer eof a globular figure, had no tail, and all of 
the fame fize and {pecies as thofe of the preced- 
ing obfervation. The other two colonies then 
appeared, the globular always remaining. 
Having again prepared the fame kind of fe- 
men, f had an opportunity of feeing the effec of 
heat in accelerating the production of animal- 
cula(1). Some were found in the fluid in lefs 
than twenty-three hours after it was taken from 
the dead body. Thefe were of a different fpecies 
from the globular; they were three times as 
large, and of a cylindrical figure. The body in 
fwimming undulated like a ferpent, which did 
not occur, or was unobferved, in the globular 
animalcula. The dead vermiculi feemed to be 
their food ; becaufe the animalcula inceffantly in 
motion furrounded them, and pecked at them 
with the anterior part of the body. In three days, 
other animalcula as minute as the {permatic ver- 
miculi appeared, along with the cylindrical ; and 
I remarked a circumftance which in femen I had 
not obferved before. In the Tra& on infufion 
animalcula, the propagation of many {pecies by 
natural divifion has been fpoken of at large. It 
has been faid, that, in feveral, the divifion begins 
in juch a manner that. the animalcule is gradually 
cleft acrofs, until it is divided into two equal 
parts, 
(1) 22 May, The thermometer 65°, 
