[ 533 1 
near half an Hour, after which it appears full of Life 
and Vigour, as well as very fleek and beautiful. 
Thefe Obfervations have been made under the In- 
fpedion of my Father, andfome other curious Friends, 
who are Witneffes of the Fads here mentioned. The 
Drawing (Tab. X. Fig i. 2.) added to this Account, , 
and intended to represent one of the Animals getting 
rid of its Skin, may, it is hoped, affift to make the fore* 
going Defcription more fully underftood* When the 
Skin is come off, if it be not taken away foon, it is 
very common for the Creature to fvvallow it whole, 
as it does all its other Food $ and if it takes in the 
Head-Part, as frequently is the Cafe, the Tail-Part, 
being filled with Air and Water, becomes like a 
blown Bladder, and proves fo unmanageable that it 
is very diverting to fee the Pains it cofts to difcharge 
the Air and Water, and reduce it to a fit Condition 
to be got down its Throat. 
Many Creatures of very different Kinds put off 
their Skins and Shells at certain Periods. All Ser- 
pents are fuppofed fo to do 5 the Skins of feveral 
Kinds being oftentimes found whole. Crabs, Lob- 
fters, Cray-fifh, Shrimps, and probably m oft or all of 
the cruftaceous Fifties, caft their Shells from time to 
time 5 and if one may guefs of the reft by the frefh 
Water Shrimp, which I have kept feveral times and 
obferved, their Shells are put off without any other 
Breach than one, longitudinally, in the Middle of 
the Belly Part, thro’ which the Body, Tail, and Claws 
are pull'd out, and the Shell left in a Manner whole. 
I* Of the Infeft Tribe, every Caterpiller has three 
or four Skins before its Change into the Aurelia 
Z. ? z z ~ State, 
