The origin of species by means of natural selection, or, The preservation of favoured races in the struggle for life / by Charles Darwin.

  • Darwin, Charles, 1809-1882.
Date:
1880
Catalogue details

Licence: Public Domain Mark

Credit: The origin of species by means of natural selection, or, The preservation of favoured races in the struggle for life / by Charles Darwin. Source: Wellcome Collection.

Provider: This material has been provided by King’s College London. The original may be consulted at King’s College London.

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    CHAPTER X. On the Imperfection of the Geological Piecord. On the absence of intermediate varieties at the present day — On ihe nature of extinct intermediate varieties ; on their number — On the lapse of time, as inferred from the rate of denudation and of deposition — On the lapse of time as estimated by years — On the poorness of our palaeontological collections — On the intermittence of geological formations — On the denudation of granitic areas — On the absence of intermediate varieties in any one formation — On the sudden appearance of groups of species — On their sudden appearance in the lowest known fossiliferous strata — Antiquity of the habitable earth Page 264-289 CHAPTER XI. On the Geological Succession of Organic Beings. On the slow and successive appearance of new species — On their different rates of change — Species once lost do not reappear — Groups of species follow the same general rules in their appearance and disappearance as do single species — On Extinction — On simultaneous changes in the forms of life throughout the world — On the affinities of extinct species to each other and to living species ■— On the state of develop- ment of ancient forms —• On the succession of the same types within the same areas — Summary of preceding and present chapter 290-315 CHAPTER XII. Geographical Distribution. Present distribution cannot be accounted for by differences in physical conditions — Importance of barriers — Affinity of the productions of the same continent — Centres of creation — Means of dispersal, by changes of climate and of the level of the land, and by occasional means —Dispersal during the Glacial period — Alternate Glacial periods in the north and south 316-342 CHAPTER XIII. Geographical Distribution—continued. Distribution of fresh-water productions — On the inhabitants of oceanic islands —• Absence of Batrachians and of terrestrial Mammals — On the relation of the inhabitants of islands to those of the nearest main- ]an(j On colonization from the nearest source with subsequent modi- fication — Summary of the last and present chapter .. .. 343-362