WITH ILLUSTRATIONS.

LONDON:

JOHN MURRAY, ALBEMARLE STREET.

1868.

The right of Translation is reserved.


BY THE SAME AUTHOR.


ON THE ORIGIN OF SPECIES BY MEANS OF NATURAL SELECTION; or The Preservation of Favoured Races in the Struggle for Life. Fourth Edition (Eighth Thousand), with Additions and Corrections. 1866. ... Murray.

A NATURALIST'S VOYAGE ROUND THE WORLD; or, A Journal of Researches into the Natural History and Geology of the Countries visited during the Voyage of H.M.S. Beagle, under the Command of Capt. Fitz-Roy, R.N. Tenth Thousand. ... Murray.

ON THE STRUCTURE AND DISTRIBUTION OF CORAL REEFS. ... Smith, Elder, & Co.

GEOLOGICAL OBSERVATIONS ON VOLCANIC ISLANDS. ... Smith, Elder, & Co.

GEOLOGICAL OBSERVATIONS ON SOUTH AMERICA. ... Smith, Elder, & Co.

A MONOGRAPH OF THE CIRRIPEDIA. With numerous Illustrations. 2 vols. 8vo. ... Hardwicke.

ON THE VARIOUS CONTRIVANCES BY WHICH BRITISH AND FOREIGN ORCHIDS ARE FERTILISED BY INSECTS; and on the Good Effects of Crossing. With numerous Woodcuts. ... Murray.

ON THE MOVEMENTS and HABITS of CLIMBING PLANTS. With Woodcuts. ... Williams & Norgate.


LONDON: PRINTED BY WILLIAM CLOWES AND SONS, STAMFORD STREET, AND CHARING CROSS.