'job Animalcules with Shells and Wheels . 
cording to the different Maturity of the Em- 
brios in thefc Bags. 
It is highly entertaining to fee a young one 
burft its Integuments, and gradually force 
its Way through them : in .doing which the 
Parent is greatly affiftant, for by wagging 
her Tail to and fro, and linking the Shell, 
Skin, or Covering, brifkly therewith, the 
young one’s Plead Part becomes as it were 
fqueezed forwards into the W T ater, tho’ the 
Tail cannot fo foon be difengaged. In this 
Condition the young one fets its Wheels 
a-going, and exerts all its Endeavours, ’till 
at laft it frees itfelf from Confinement, and 
fwims away, wagging its Tail as the old one 
had done before it, and leaving the Integu¬ 
ment adhering to the Shell of the Parent; 
who then ufes Abundance of Contrivances 
and Efforts to get rid of it, linking againft 
it with her Tail, fixing the End of her Tail 
thereto and darting her Body forwards, with 
feveral other very odd Motions not eafy to 
be defcrihed. 
A young one almoft difengaged from the 
Shell, being faflened thereto only by the 
Tail, is fhewn jig. 9. b, The Subjedt from 
whence this Pidlure was exactly taken, 
during the Performance of all the Particu¬ 
lars above defcrihed, had alfo another Em* 
brio, c , adhering to its Shell. 
Thefe Animals have one, two, three, nay, 
fometimes even four or five of thefe young 
' p j ones 
