Of Anlmalcula in Fluids, ijj 
oyfters ra in rapid motion were observed therein, abed, 
fig. 222. reprefents one of them, of which a is the head, 
their fhape altered as they placed themfelves in different 
pofitions before the eye, their motion was fometimes 
diredf, at others circular. The fifth and fixth day fome 
of them feemed to be dead; but, on continuing to ob~ 
ferve them, were afterwards found to move with a pro¬ 
digious fvviftnefs, one going one way, another the con¬ 
trary, often rubbing and flopping againft each other; 
then being diflurbed by others rufhing flrongly againft 
them, altered the ftate of their rencounter, and directed 
themlelves to another place; they ftretch out and fhortert 
themfelves confiderably, and are often feen coupled as at 
a and c, fig. 223. and fig. 224. Moving together from 
a towards b, and from c towards d, they turn much 
flower than thofe in pepper-water, and perform their 
circular motion much as they do, turning fometimes on 
their own center, and fometimes on a point near the ex¬ 
tremity of their head. This liquor being obferved near 
eight days, no other animals than thofe of the fame figure 
could be found therein. 
In frefh oyfter liquor diluted with common water, were 
found animalcules with two moving horns in each of 
their heads, which formed a kind of crefcent as at e, in 
others as at d, fig. 225. but the horns are fo tranfparent, 
that they rnuft be viewed attentively, and that for fome 
time before they can be difcovered. 
On putting the liquor of fix or feven oyfters into a 
glafs vefiel one day at noon, the next day at feven a 
quantity of thefe minute oyfters were found fwimming 
therein, although the vefiel was flopped : whence it feems 
iiot improbable, but that thefe animals Were produced 
K 4 from 
m Joblott'-s Obferv, p, 20, 
