M Database Inspector
Not logged in. Login

Export to Excel select * from OriginOfSpecies where title = '10-01 - On the slow and successive appearance of new species' order by subject, title, ordinal ( Row)
subject
title
ordinal
description
10 - On The Geological Succession of Organic Beings 10-01 - On the slow and successive appearance of new species 10 Let us now see whether the several facts and rules relating to the geological succession of organic beings, better accord with the common view of the immutability of species, or with that of their slow and gradual modification, through descent and natural selection.

New species have appeared very slowly, one after another, both on the land and in the waters.

Lyell has shown that it is hardly possible to resist the evidence on this head in the case of the several tertiary stages; and every year tends to fill up the blanks between them, and to make the percentage system of lost and new forms more gradual.

Sir Charles Lyell
Sir Charles Lyell


In some of the most recent beds, though undoubtedly of high antiquity if measured by years, only one or two species are lost forms, and only one or two are new forms, having here appeared for the first time, either locally, or, as far as we know, on the face of the earth.

If we may trust the observations of Philippi in Sicily, the successive changes in the marine inhabitants of that island have been many and most gradual.

Rodolfo Armando Philippi
Rodolfo Armando Philippi

Sicily
Sicily


The secondary formations are more broken; but, as Bronn has remarked, neither the appearance nor disappearance of their many now extinct species has been simultaneous in each separate formation.

Heinrich Georg Bronn
Heinrich Georg Bronn