Of the frejh Water Polype ;• i 
e, fig. 392. the day-light was Teen through the hole of 
communication i. Mr. Trembley not being contented 
with making this experiment once, repeated it feven 
times, and met with the fame fuccefs in five of them. 
This communication between the mother and its 
young may be feen on feeding them ; for after the mo¬ 
ther a b,. fig. 393. had eaten, the bodies of its young 
ones fwelled, being filled with the aliments as if they 
themfelves had been eating them at their own mouths 
c d e i o. 
In the long armed polypes, the young ones do not 
flioot out from the tail part b c, but only from the part 
a %• 39 6 - 
It is alfo remarkable, that polypes do not only produce 
feveral little ones at the fame time, all remaining fixed 
to their mother, but that even fome of thofe little ones 
at that very time have two or three young ones alfo, ot 
which fome are perfectly formed, as at fig. 396. 
This figure is fufficient to fhew with what prompti¬ 
tude the polypes increafe and multiply. The whole 
groupe formed by this mother and her nineteen young 
ones, was but an inch and a quarter long, and one inch 
broad Dutch meafure ; the arms of the mother, and the 
little ones, for the molt part were hanging down towards 
the bottom of the veilel, whi'lft the polype was fufpended 
on the furface of the water. This mother eat about a 
dozen of the aquatic fleas every day, and the little ones, 
which were in a Hate to eat, devoured amongft them 
about twenty every day. 
All the frelh water polypes, with arms in form of 
horns, are mothers, for each individual of this fort pro¬ 
duce young ones. 
Mr. Trembley fays, he hath non rimed a thoufand po¬ 
lypes, and never found one which did not multiply, 
O 2 after 
