Contributions to the theory of natural selection. A series of essays ... By Alfred Russel Wallace ...

vi PREFACE.
Natural History," September, 1855. Reprinted without alteration of the text.
II.-ON THE TENDENCY OF VARIETIES TO DEPART
INDEFINITELY FROM THE ORIGINAL TYPE.
First published in the " Journal of the Proceedings
of the Linniean Society," August, 1858. Reprinted
without alteration of the text, except one or two
grammatical emendations.
II.- MIMICRY AND OTHER PROTECTIVE RESEMBLANCES
AMONG ANIMALS.
First published in the 4 Westminster Review," July,
1867. Reprinted with a few corrections and some
important additions, among which I may especially
mention 3Ir. Jenner Weir's observations and experiments on the colours of the caterpillars eaten or
rejected by birds.
IV. —THE MALAYAN PAPILIONIDEE, OR SWALLOWTAILED BUTTERFLIES, AS ILLUSTRATIVE OF THE
THEORY OF NATURAL SELECTION.
First published in the'" Transactions of the Linnmean Society," Vol. XXV. (read March, 1864), under
the title, "' On the Phenomena of Variation and Geographical Distribution, as illustrated by the Papilionidm
of the 3Malayan Region."
The introductory part of this essay is now reprinted,
omitting tables, references to plates, &c., with some additions, and several corrections. Owing to the publi