in the other zones. Buffon has
remarked that even in latitudes almost the same the animals of the
new continent are not the same as those of the old.

"Finally the Count Lacepede, wishing to give to this well-founded
fact the precision which he believed it susceptible, has traced
twenty-six zooelogical divisions on the dry parts of the globe, and
eighteen over the ocean; but there are many other influences than
those which depend on localities and temperatures.

"Everything tends, then, to prove my assertion--namely, that it is
not the form either of the body or of its parts which has given rise
to habits and to the mode of life of animals, but, on the contrary,
it is the habits, the mode of life, and all the other influential
circumstances which have with time produced the form of the bodies
and organs of animals. With new forms new faculties have been
acquired, and gradually nature has arrived at the state where we
actually see it.

* * * * *

"Finally as it is only at that extremity of the animal kingdom where
occur the most simply organized animals that we meet those which may
be regarded as the true germs of animality, and it is the same at
the same end of the vegetable series; is it not at this end of the
scale, both animal and vegetable, that nature has commenced and
recommenced without ceasing the first germ of her living production?
Who is there, in a word, who does not see that the process of
perfection of those of these first germs which circumstances have
favored will gradually and after the lapse of time give rise to all
the degrees of perfection and of the composition of the
organization, from which will result this multiplicity and this
diversity of living beings of all orders with which the exterior
surface of our globe is almost everywhere filled or covered?

"Indeed, if the manner (_usage_) of life tends to develop the
organization, and even to form and multiply the organs, as the state
of an animal which has just been born proves it, compared to that
where it finds itself when it has reached the term where its organs
(beginning to deteriorate) cease to make new developments; if, then,
each particular organ undergoes remarkable changes, according as it
is exercised and according to the manner of which I have shown you
some examples, you will understand that in carrying you to the end
of the an