CONCHYLIA DITHYRA INSULARUM BRITANNICARUM. The Bivalve Shells of the British Isles, systematically arranged. By William Turton, M.D. Reprinted verbatim from the original edition. The illustrations, printed from the original copper-plates, are distinguished for their accurate detail. Twenty coloured plates. Price 2l. 10s.

POPULAR HISTORY OF MOLLUSCA; or, Shells and their Animal Inhabitants. By Mary Roberts. Royal 16mo, with twenty coloured plates by Wing. Price 10s. 6d.

"This little volume forms another of the excellent series of illustrated works on various departments of Natural History, for which the public is indebted to Mr. Reeve.... When we add, that the plates contain no fewer than ninety figures of shells, with their animal inhabitants, all of them well, and several admirably, executed, and that the text is written throughout in a readable and even elegant style, with such digression in poetry and prose as serve to relieve its scientific details, we think that we have said enough to justify the favourable opinion we have expressed."—British and Foreign Medico-Chirurgical Review.

CURTIS'S BRITISH ENTOMOLOGY, being Illustrations and Descriptions of the Genera of Insects found in Great Britain and Ireland, comprising coloured figures, from nature, of the most rare and beautiful species, and, in many instances, of the plants upon which they are found. By John Curtis, F.L.S.

The 'British Entomology' was originally brought out in Monthly Numbers, size royal 8vo, at 4s. 6d., each containing four coloured plates with text. It was commenced in 1824, and completed in 1840, in 193 Numbers, forming 16 volumes, price £43 16s.

The work is now offered new, and in the best condition:—

Price to Subscribers for complete copies in sixteen volumes £21. Price of the new issue, and of odd Numbers . . . 3s. 6d. per No.

Vols. I. and II. of the New Issue are now ready for delivery.

INSECTA BRITANNICA. Diptera. By F. Walker, Esq. F.L.S. Vol. I. Illustrated with plates. Price 25s.

EPISODES OF INSECT LIFE. Three vols., crown 8vo, with 108 illustrations. Price 2l. 8s., elegantly bound in fancy cloth. Coloured and bound extra, gilt back, sides, and edges, 3l. 3s.