leym

Updated: June 10, 2025

But if, the genera remaining the same, the species are changed, we have entered upon a new period; and no similarity of climate, or of geographical and local conditions, can then recall the old species which a long series of destructive causes in the animate and inanimate world has gradually annihilated. Ammonites Deshayesii, Leym.

Sir Charles Lyell - The Student's Elements of Geology