The Foundations of the Origin of SpeciesPart 1 — PART II{305} ON THE EVIDENCE FAVOURABLE AND OPPOSED TO THE VIEW THAT SPECIES ARE NATURALLY FORMED RACES, DESCENDED FROM COMMON STOCKSReading editionChapter navigation18 reading sectionsGo to chapterChoose a chapter…THE FOUNDATIONS OF THE ORIGIN OF SPECIESTHE FOUNDATIONS OF THE ORIGIN OF SPECIES TWO ESSAYS WRITTEN IN 1842 AND 1844 by CHARLES DARWININTRODUCTIONPART I.PART II{104}.Chapter I · ON THE VARIATION OF ORGANIC BEINGS UNDER DOMESTICATION; AND ON THE PRINCIPLES OF SELECTIONChapter II · ON THE VARIATION OF ORGANIC BEINGS IN A WILD STATE; ON THE NATURAL MEANS OF SELECTION; AND ON THE COMPARISON OF DOMESTIC RACES AND TRUE SPECIESChapter III · ON THE VARIATION OF INSTINCTS AND OTHER MENTAL ATTRIBUTES UNDER DOMESTICATION AND IN STATE OF NATURE; ON THE DIFFICULTIES IN THIS SUBJECT; AND ON ANALOGOUS DIFFICULTIES WITH RESPECT TO CORPOREAL STRUCTURESPART II{305} ON THE EVIDENCE FAVOURABLE AND OPPOSED TO THE VIEW THAT SPECIES ARE NATURALLY FORMED RACES, DESCENDED FROM COMMON STOCKSChapter IV · ON THE NUMBER OF INTERMEDIATE FORMS REQUIRED ON THE THEORY OF COMMON DESCENT; AND ON THEIR ABSENCE IN A FOSSIL STATEChapter V · GRADUAL APPEARANCE AND DISAPPEARANCE OF SPECIES{326}Chapter VI · ON THE GEOGRAPHICAL DISTRIBUTION OF ORGANIC BEINGS IN PAST AND PRESENT TIMESChapter VII · ON THE NATURE OF THE AFFINITIES AND CLASSIFICATION OF ORGANIC BEINGS{425}Chapter VIII · UNITY OF TYPE IN THE GREAT CLASSES; AND MORPHOLOGICAL STRUCTURESChapter IX · ABORTIVE OR RUDIMENTARY ORGANSChapter X · RECAPITULATION AND CONCLUSIONINDEXFootnotesPrevious chapter ←Part 1 — Chapter III · ON THE VARIATION OF INSTINCTS AND OTHER MENTAL ATTRIBUTES UNDER DOMESTICATION AND IN STATE OF NATURE; ON THE DIFFICULTIES IN THIS SUBJECT; AND ON ANALOGOUS DIFFICULTIES WITH RESPECT TO CORPOREAL STRUCTURESNext chapter →Part 1 — Chapter IV · ON THE NUMBER OF INTERMEDIATE FORMS REQUIRED ON THE THEORY OF COMMON DESCENT; AND ON THEIR ABSENCE IN A FOSSIL STATEAll chapters and sections (18)Other sectionsTHE FOUNDATIONS OF THE ORIGIN OF SPECIESTHE FOUNDATIONS OF THE ORIGIN OF SPECIES TWO ESSAYS WRITTEN IN 1842 AND 1844 by CHARLES DARWININTRODUCTIONParts1Part 1 · Other sectionsPART II{104}.Part 1 · Chapters123Part 1 · Other sectionsPART II{305} ON THE EVIDENCE FAVOURABLE AND OPPOSED TO THE VIEW THAT SPECIES ARE NATURALLY FORMED RACES, DESCENDED FROM COMMON STOCKSPart 1 · Chapters45678910Part 1 · Other sectionsINDEXFootnotesPART II{305} ON THE EVIDENCE FAVOURABLE AND OPPOSED TO THE VIEW THAT SPECIES ARE NATURALLY FORMED RACES, DESCENDED FROM COMMON STOCKSNotes in this chapterNote 1 · In the Origin the division of the work into Parts I and II is omitted. In the MS. the chapters of Part II are numbered afresh, the present b← CHAPTER III ON THE VARIATION OF INSTINCTS AND OTHER MENTAL ATTRIBUTES UNDER DOMESTICATION AND IN STATE OF NATURE; ON THE DIFFICULTIES IN THIS SUBJECT; AND ON ANALOGOUS DIFFICULTIES WITH RESPECT TO CORPOREAL STRUCTURESCHAPTER IV ON THE NUMBER OF INTERMEDIATE FORMS REQUIRED ON THE THEORY OF COMMON DESCENT; AND ON THEIR ABSENCE IN A FOSSIL STATE →