- On the Law which has regulated the introduction of New Species. Pp. 1-25
- On the Tendency of Varieties to depart indefinitely from the Original Type. Pp. 26-44
- Mimicry, and other Protective Resemblances among Animals. Pp. 45-129
- The Malayan PapilionidÆ, or Swallow-tailed Butterflies, as illustrative of the Theory of Natural Selection. Pp. 130-200
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