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249 On probable ancestral colours of female birds. 255 Protective colouring of the Waxwing.

VIII.— Creation by Law. 293 Amount of variation in dogs. 296, 297. The Times” on Natural Selection. 298 to 300. On intermediate or generalized forms of

extinct animals as an indication of transmuta

tion or development. 302 Tabular demonstration of the Origin of Species by

Natural Selection.

IX.The development of Human Races, under

the law of Natural Selection. 316 On colour as perhaps correlated with immunity

from disease in man. 326, 327. On the probable future development of man. 330 Concluding paragraph rewritten.

London, March, 1870.

CONTENTS.

I.-On the Law which has regulated the introduction of New

Species.

Geographical distribution dependent on Geologic Changes — A Law

deduced from well-known Geographical and Geological facts— The

form of a true system of Classification determined by this Law-Geo-

graphical Distribution of Organisms-Geological Distribution of the
forms of Life-High Organization of very ancient Animals consistent
with this Law-Objections to Forbes' Theory of Polarity-Rudi-
mentary Organs--Conclusion . . . . . . Pp. 1 – 25

III.-Mimicry, and other Protective Resemblances among

Animals.

Test of true and false Theories-Importance of the Principle of Utility

-Popular Theories of Colour in Animals-Importance of Conceal-
ment as influencing Colour—Special modifications of Colour-Theory
of Protective Colouring-Objection that Colour as being dangerous
should not exist in Nature—Mimicry-Mimicry among Lepidoptera
-Lepidoptera mimicking other Insects-Mimicry among Beetles-
Beetles mimicking other Insects-Insects mimicking Species of other
Orders-Cases of Mimicry among the Vertebrata---Mimicry among
Snakes - Mimicry among Birds-Mimicry among Mammals-Objec-

tions to Mr. Bates' Theory of Mimicry—Mimicry by Female Insects
only-Cause of the dull Colours of Female Birds—Use of the gaudy
Colours of many Caterpillars-Summary-General deductions as to
Colour in Nature--Conclusion . . . . . Pp. 45–129

IV.The Malayan Papilionidae, or Swallow-tailed Butterflies,

as illustrative of the Theory of Natural Selection.

Special value of the Diurnal Lepidoptera for inquiries of this Nature-

Question of the rank of the Papilionidæ-Distribution of the Papi-
lionidæ-Definition of the word Species-Laws and Modes of Varia-
tion — Simple Variability-Polymorphism or Dimorphism - Local
form or variety-Co-existing Variety--Race or Subspecies-Species
-Variation as specially influenced by Locality-Local Variation of

Size - Local Variation of Form - Local Variations of Colour-Re-

marks on the facts of Local Variation — Mimicry - Concluding

Remarks on Variation in Lepidoptera-Arrangement-Geographical

Distribution - Remarkable peculiarities of the island of Celebes--

Concluding Remarks . . . . . . . Pp. 130—200

V.-On Instinct in Man and Animals.

How Instinct may be best Studied-Definition of Instinct-Does Man

possess Instincts ?-How Indians travel through unknown and track-
less Forests . . . . . . . . Pp. 201-21

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