Page - 335 - in The Origin of Species
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Text of the Page - 335 -
THE LAPSE OF TIME 335
other. Hence, in all such cases, we should be unable to rec-
ognise the parent-form of any two or more species, even if
we closely compared the structure of the parent with that of
its modified descendants, unless at the same time we had a
nearly perfect chain of the intermediate links.
It is just possible by the theory, that one of two living
forms might have descended from the other; for instance, a
horse from a tapir; and in this case direct intermediate links
will have existed between them. But such a case would im-
ply that one form had remained for a very long period unal-
tered, whilst its descendants had undergone a vast amount
of change ; and the principle of competition between organism
and organism, between child and parent, will render this a
very rare event
; for in all cases the new and improved forms
of life tend to supplant the old and unimproved forms.
By the theory of natural selection all living species have
been connected with the parent-species of each genus, by dif-
ferences not greater than we see between the natural and
domestic varieties of the same species at the present day ; and
these parent-species, now generally extinct, have in their
turn been similarly connected with more ancient forms
; and
so on backwards, always converging to the common ancestor
of each great class. So that the number of intermediate and
transitional links, between all living and extinct species, must
have been inconceivably great. But assuredly, if this theory
be true, such have lived upon the earth.
ON THE LAPSE OF TIME, AS INFERRED FROM THE RATE OF
DEPOSITION AND EXTENT OF DENUDATION
Independently of our not finding fossil remains of such in-
finitely numerous connecting links, it may be objected that
time cannot have sufficed for so great an amount of organic
change, all changes having been effected slowly. It is hardly
possible for me to recall to the reader who is not a practical
geologist, the facts leading the mind feebly to comprehend the
lapse of time. He who can read Sir Charles Lyell's grand
work on the Principles of Geology, which the future historian
will recognise as having produced a revolution in natural
science, and yet does not admit how vast have been the past
back to the
book The Origin of Species"
The Origin of Species
- Title
- The Origin of Species
- Author
- Charles Darwin
- Publisher
- P. F. Collier & Son
- Location
- New York
- Date
- 1909
- Language
- English
- License
- PD
- Size
- 10.5 x 16.4 cm
- Pages
- 568
- Keywords
- Evolutionstheorie, Evolution, Theory of Evolution, Naturwissenschaft, Natural Sciences
- Categories
- International
- Naturwissenschaften Biologie
Table of contents
- EDITOR'S INTRODUCTION 5
- AN HISTORICAL SKETCH of the Progress of Opinion on the Origin of Species 9
- INTRODUCTION 21
- Variation under Domestication 25
- Variation under Nature 58
- Struggle for Existence 76
- Natural Selection; or the Survival of the Fittest 93
- Laws of Variation 145
- Difficulties of the Theory 178
- Miscellaneous Objections to the Theory of Natural Selection 219
- Instinct 262
- Hybridism 298
- On the Imperfection of the Geological Record 333
- On the Geological Succession of Organic Beinss 364
- Geographical Distribution 395
- Geographical Distribution - continued 427
- Mutual Affinities of Organic Beings: Morphology: Embryology: Rudimentary Organs 450
- Recapitulation and Conclusion 499
- GLOSSARY 531
- INDEX 541