STATES OF INSECTS. (Hge.) 6] 
(o 
good, I think, that the same analogy should take place 
in their developments. If the adult man or quadruped, 
&c. is evidently an evolution of the foetus, as from mi- 
croscopical observations it appears that they are?, if the 
teeth, horns, and other parts, &c. to be acquired in their 
progress to that state are already in them in their em- 
bryos, we may also conclude that the butterfly and its or- 
gans, &c. are allin the newly-hatched caterpillar. Again, 
if the blossom and its envelopes are contained in the 
gemma, the bulb, &c. where they have been discovered”, 
it follows analogically that the butterfly and its integu- 
ments all preexist in its forerunner. 
Perhaps after this view of the objections to Dr. He- 
rold’s hypothesis, it will not be necessary to say much 
with regard to the argument he draws from the change 
of organs—the loss of some and the acquisition of others 
—since this may readily be conceived to be the natural 
consequence of the vital forces tending more and more 
to the formation of the butterfly, and the withdrawing 
of their action more and more from the caterpillar; I 
shall not, therefore, enter further into the question, espe- 
cially since the change of organs will come more regu- 
larly under our notice upon a future occasion. 
Winged insects, many branchiopod Crustacea, and 
the Batrachian reptiles, have been observed by Dr. Virey 
to bear some analogy to the mammalia, aves, &c. in an- 
other respect. In leaving their egg, they only quit their 
first integument, answering to the chorion or external 
* Leeuwenhoek discovered in the incipient foetus of a sheep, not 
larger than the eighth part of a pea, all the principal parts of the 
future animal. Arc. Nat. I. ii. 165, 173. 
> Bonnet, Gewur, v. 284. 
