Selection, by the same constant interaction of Adaptation and Heredity [what is Heredity but another word for unknown causes, unless it is explained in some such manner as in ‘Life and Habit'?] by which all the other purposive contrivances of the animal organization have been slowly and gradually evolved during the struggle for existence."

I see no evidence for "premeditated aim" at any modification very far in advance of an existing organ, any more than I do for "premeditated aim" on man's part at any as yet inconceivable mechanical invention; but as in the case of man's inventions, so also in that of the organs of animals and plants, modification is due to the accumulation of small, well-considered improvements, as found necessary in practice, and the conduct of their affairs. Each step having been purposive, the whole road has been travelled purposively; nor is the purposiveness of such an organ, we will say, as the eye, barred by the fact that invention has doubtless been aided by some of those happy accidents which from time to time happen to all who keep their wits about them, and know how to turn the gifts of Fortune to account.

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

A CATALOGUE

OF WORKS ON

Science and Art,
Natural History,

General Literature.

BOGUE'S HALF-HOUR VOLUMES.

THE GREEN LANES: A Book for a Country Stroll. By J. E. TAYLOR, F.L.S., F.G.S. Illustrated with 300 Woodcuts. Fourth Edition. Crown 8vo, cloth, 45.

THE SEA-SIDE; or, Recreations with Marine Objects. By J. E. TAYLOR, F.L.S., F.G.S. Illustrated with 150 Woodcuts. Third Edition. Crown 8vo, cloth, 4s.

Numerous

GEOLOGICAL STORIES: A Series of Autobiographies in
Chronological Order. By J. E. TAYLOR, F.L.S., F.G.S.
Illustrations. Fourth Edition. Crown 8vo, cloth, 4s.

THE AQUARIUM: Its Inhabitants, Structure, and Manage. ment. By J. E. TAYLOR, F.L.S. F.G.S. With 238 Woodcuts. Second Edition. Crown 8vo, cloth extra, 6s.

THE MICROSCOPE: A Popular Guide to the Use of the Instrument. By E. LANKESTER, M.D., F.R.S. With 250 Illustrations. Sixteenth Thousand. Fcap. 8vo, cloth plain, 2s. 6d. ; coloured, 45.

THE TELESCOPE: A Popular Guide to its Use as a means of Amusement and Instruction. By R. A. PROCTOR, B.A. With numerous Illustrations on Stone and Wood. Fifth Edition. Fcap. 8vo, cloth, 2s. 6d.

THE STARS: A Plain and Easy Guide to the Constellations. By R. A. PROCTOR, B.A. Illustrated with 12 Maps. Ninth Thousand. Demy 4to, boards, 5s.

ENGLISH ANTIQUITIES.

By LLEWELLYNN JEWITT, F.S.A. Contents:- Barrows, Stone Arches, Cromlechs-Implements of Flint and Stone-Celts and other Instruments of Bronze-Roman Roads, Towns, &c. - Tesselated Pavements, Temples, Altars Ancient PotteryArms and Armour-Sepulchral Slabs and Brasses-Coins-Church BellsGlass-Stained Glass Tiles-Tapestry-Personal Ornaments, &c. With 300 Woodcuts. Crown 8vo, cloth extra, 5s.

ENGLISH FOLK-LORE. By the Rev. T. F. THISELTON

DYER.

Contents:

Trees

Plants Flowers - The Moon - BirdsAnimals-Insects-Reptiles-Charms-Birth-Baptism - Marriage-Death -Days of the Week-The Months and their Weather Lore-Bells-Miscellaneous Folk-Lore. Crown 8vo, cloth, 5s.

PLEASANT DAYS IN PLEASANT PLACES.

Notes

of Home Tours. By EDWARD WALFORD, M.A., late Scholar of Balliol College, Oxford, Editor of "County Families," &c. Contents:-Dorney and Burnham-Shanklin-Hadleigh-St. David's-Winchilsea-Sandwich -St. Osyth's Priory-Richborough Castle-Great Yarmouth-Old Moreton Hall-Cumnor-Ightham-Shoreham and Bramber-Beaulieu-Kenilworth -Tattershall Tower-Tower of Essex. Illustrated with numerous Woodcuts. Crown 8vo, cloth extra, 5s.

Other Volumes in Preparation.

London: HARDWICKE & BOGUE, 192, Piccadilly, W.

INDEX OF SUBJECTS.