390).

"If we once admit that the ass belongs to the horse family, and that it only differs from it because it has been modified (_degenere_), we may likewise say that the monkey is of the same family as man, that it is a modified man, that man and the monkey have had a common origin like the horse and ass, that each family has had but a single source, and even that all the animals have come from a single animal, which in the succession of ages has produced, while perfecting and modifying itself, all the races of other animals" (tome iv., p.

382).

"If it were known that in the animals there had been, I do not say several species, but a single one which had been produced by modification from another species; if it were true that the ass is only a modified horse, there would be no limit to the power of nature, and we would not be wrong in supposing that from a single being she has known how to derive, with time, all the other organized beings" (_ibid._, p.

382).
The next sentence, however, translated, reads as follows: "But no.