“What Lamarck then foretold has come to pass; the more new forms have been multiplied, the less are we able to decide what we mean by a variety, and what by a species. In fact, zoologists and botanists are not only more at a loss than ever how to define a species, but even to determine whether it has any real existence in nature, or is a mere abstraction of the human intellect, some contending that it is constant within certain narrow and impassable limits of variability, others that it is capable of indefinite and endless modification.”

Source: The Geological Evidences of the Antiquity of Man (1863), Ch.20, p. 389

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Charles Lyell 103
British lawyer and geologist 1797–1875

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“No species remains constant: that great renovator of matter
Nature, endlessly fashions new forms from old: there’s nothing
in the whole universe that perishes, believe me; rather
it renews and varies its substance. What we describe as birth
is no more than incipient change from a prior state, while dying
is merely to quit it. Though the parts may be transported
hither and thither, the sum of all matter is constant.”

Nec species sua cuique manet, rerumque novatrix ex aliis alias reparat natura figuras: nec perit in toto quicquam, mihi credite, mundo, sed variat faciemque novat, nascique vocatur incipere esse aliud, quam quod fuit ante, morique desinere illud idem. cum sint huc forsitan illa, haec translata illuc, summa tamen omnia constant.

Nec species sua cuique manet, rerumque novatrix
ex aliis alias reparat natura figuras:
nec perit in toto quicquam, mihi credite, mundo,
sed variat faciemque novat, nascique vocatur
incipere esse aliud, quam quod fuit ante, morique
desinere illud idem. cum sint huc forsitan illa,
haec translata illuc, summa tamen omnia constant.
Book XV, 252–258 (as translated by Peter Green)
Metamorphoses (Transformations)

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