METAMORPHOSES. 37 
or eight days before its change into the pupa.’ A caterpillar, then, may 
be regarded as a locomotive egg, having for its embryo the included 
butterfly, which after a certain period assimilates to itself the animal sub- 
stances by which it is surrounded; has its organs gradually developed ; 
and at length breaks through the shell which encloses it. 
This explanation strips the subject of every thing miraculous, yet by no 
means reduces it to a simple or uninteresting operation. Our reason is 
confounded at the reflection that a Jaya, at first not thicker than a thread, 
includes the germs of its own triple, or sometimes octuple, teguments ; 
the case of a chrysalis, and of a butterfly, all curiously folded in each 
other; with an apparatus of vessels for breathing and digesting, of nerves 
for sensation, and of muscles for moving ; and that these various forms of 
existence will undergo their successive evolutions, by aid of a few leaves 
received into its stomach. And still less able are we to comprehend how 
this organ should at one time be capable of digesting leaves, at another 
only honey; how one while a silky fluid should be secreted, at another 
none ; or how organs at one period essential to the existence of the insect 
should at another be cast off, and the whole system which supported them 
vanish.” 
Nor does this explanation, though it precludes the idea of that re- 
semblance, in every particular, which, at one time, was thought to obtain 
between the metamorphosis of insects, especially of the Lepidoptera order, 
and the resurrection of the body, do away that general analogy which 
cannot fail to strike every one who at all considers the subject. yen 
Swammerdam, whose observations have proved that the analogy is not so 
complete as had been imagined, speaking of the metamorphosis of insects, 
uses these strong words: “ This process is formed in so remarkable a 
manner in butterflies, that we see therein the resurrection painted before 
our eyes, and exemplified so as to be examined by our hands.”* To see, 
indeed, a caterpillar crawling upon the earth sustained by the most 
ordinary kinds of food, which, when it has existed a few weeks or months 
under this humble form, its appointed work being finished, passes into an 
intermediate state of seeming death, when it is wound up in a kind of 
shroud and encased in a coffin, and is most commonly buried under the 
earth (though sometimes its sepulchre is in the water, and at others in 
various substances in the air), and after this creature and others of its 
tribe have remained their destined time in this death-like state, to behold 
_earth, air, and water give up their several prisoners; to survey them, when, 
called by the warmth of the solar beam, they burst from their sepulchres, 
cast off their cerements, from this state of torpid inactivity, come forth, as 
a bride out of her chamber —to survey them, I say, arrayed in their 
nuptial glory, prepared to enjoy a new and more exalted condition of life, 
in which ail their powers are developed, and they are arrived at the per- 
1 Reaum. i. 859. 
2 Dr. Herold (Hntwickelungs geschichte der Schmetterlinge), and other modern 
physiologists, deny that the germs of the skins of the caterpillar and chrysalis 
and of the future butterfly exist in the young caterpillar; but, for reasons assigned 
in detail in another place (vol. iii. edit. 6. pp. 52—62.}, the theory of Swammerdam 
and Bonnet, as above explained, is here preferred. 
© Hill's Swamm. i, 127. a. 
p 3 
’ . 
