Mammalia. Revised and Corrected by Professor E. PERCEVAL WRIGHT, M.D. Illustrated throughout.

The World before the Deluge. With 233 Illustrations. Fourth Edition. Revised and Corrected by W. H. BRISTOW, F.R.S.

The Ocean World. With 427 Illustrations. Third Edition. Revised and Corrected by Professor E. PERCEVAL WRIGHT, M.D.

Reptiles and Birds. With 300 Illustrations. Second Edition. Revised and Corrected by Captain PARKER GILLMORE.

The Insect World. With 576 Illustrations. Third Edition. Revised by Professor DUNCAN, M.D., F.R.S.

The Vegetable World. With 470 Illustrations. Third Edition. Revised and Corrected by an EMINENT BOTANIST.

Cassell's Brehm's Book of Birds. Translated from the Text of Dr. BREHM, by Professor T. RYMER JONES, F.R.S. With upwards of 400 Engravings on Wood, and numerous full-page Plates, printed in Colours, from Original Designs by F. W. KEYL. Complete in Four Volumes, 4to, cloth, 7s. 6d.; cloth gilt, gilt edges, 10s. each; or Two Vols., half-calf, £2 2s.

The Book of the Horse. BY SAMUEL SIDNEY, Manager of the Islington Horse Show, &c. With 25 fac-simile Coloured Plates, from Original Paintings, and upwards of 100 Wood Engravings. Demy 4to, cloth gilt, 31s. 6d.

Transformations of Insects. By Professor P. MARTIN DUNCAN, M.D., F.R.S. With about 250 Illustrations. New and Cheaper Edition. Now ready, demy 8vo, cloth, 7s. 6d.

Cassell's Popular Natural History. With about 2,000 Engravings and Coloured Plates. Complete in Four Volumes, cloth, 42s.