Page:A Treatise on Geology, volume 1.djvu/283

 CHAP. VI.

From each of these localities, the ratio of the species now living has been determined by M. Deshayes as under:—

Mr. Lyell, by independent researches, was induced to class the Sicilian deposits as a separate formation from the rest of the upper group of Deshayes; but in other respects his scheme of nomenclature subjoined is perfectly in accordance with Deshayes' results.

The terms are derived from the Greek καινος, recent, combined with ήως, the dawn, μειῶν, less, and πλειῶν, more.