VOLUME IX: Part I: Contributions to the Theory of Natural Selection I. On the Law which has regulated the introduction of New Species. II. On the Tendency of Varieties to depart indefinitely from the Original Type. III. Mimicry, and other Protective Resemblances among Animals. IV. The Malayan Papilionidoe, or Swallow-tailed Butterflies, as illustrative of the Theory of Natural Selection. V. On Instinct in Man and Animals. VI. The Philosophy of Birds’ Nests. VII. A Theory of Birds’ Nests; showing the relation of certain differences of colour in female birds to their mode of nidification. VIII. Creation by Law. IX. The Development of Human Races under the Law of Natural Selection. X. The Limits of Natural Selection as applied to Man. Article: Man and natural selection, Part II: On the Tendency of Species to Form Varieties