Of Animalcula in Fluids, 151 
celerity, that it is troublefome to turn the eye upon a 
fight fo new and furprifing. In certain places thereof 
there are feen fome differently coupled. Others alfo, that 
reft themfelves, and keep the watch as foldiers do, which 
feera apprehenllve of being furprifed; whilft others go out 
a good way from the mafs as though they would make 
fome difcovery, then they return again as if they had 
fomething to relate to thofe which kept the watch, and 
this is feen all round the mafs. 
Ill another drop, taken from another place of the fame 
veffel, has been often feen another new and curious fight, 
viz,, that fort of animalcula which are long and flat, called 
foies, and are reprefented by A B C D, in fig. 260. The 
fides of this animalcule are very ftiarp ; the head and all 
the reft of its body is transparent, except a few brown 
fpots which appear within. The different poftures, and 
the variety of motions obfervable in thefe animalcula, 
caufe more pleafure in beholding them through a microf- 
cope, and greater fatisfa&ion than can poftibly be ima¬ 
gined by reading the moft particular defcription of them. 
In the glafs where only the leaves were infufed, there 
were amongft others fome animalcules like thofe exprel- 
led at E, f, Gr, fig. 261. at one end of thefe figures may 
be feen a confiderable opening which is their mouth, and 
appears fometimes round as at F, and fometimes ovalifh 
as at E and G ; at other times it is fo firmly doled as 
not to be difcovered. It fwims by jolts, and ballancing 
from right to left, conducting itfelf in appearance by a 
circular motion of its head. It alfo changes its figure by 
folding, unfolding, and fuddenly rolling itfelf up in the. 
form ot a ball, and then alternately ftretching out again 
very quick into its natural ftate. 
There is another fort of animalcula that appears to 
have neither head nor eyes, and are reprefented at HI K, 
L 4 fig. 
