Flat Worms. By F. W. Gamble, M.Sc. Vict., Owens College.—Nemertines. By Miss L. Sheldon, Newnham College, Cambridge.—Thread-worms, etc. By A. E. Shipley, M.A., F.R.S., Fellow of Christ's College, Cambridge.—Rotifers. By Marcus Hartog, M.A., Trinity College, Cambridge, D.Sc. Lond., Professor of Natural History in the Queen's College, Cork.—Polychaet Worms. By W. Blaxland Benham, D.Sc., Hon. M.A. Oxon., Professor of Biology in the University of Otago.—Earth-worms and Leeches. By F. E. Beddard, M.A. Oxon., F.R.S., Prosector to the Zoological Society, London.—Gephyrea, etc. By A. E. Shipley, M.A., F.R.S., Fellow of Christ's College, Cambridge.—Polyzoa. By S. F. Harmer, Sc.D., F.R.S., Fellow of King's College, Cambridge.

CAMBRIDGE REVIEW.—"Several of the groups treated of in this volume are unknown by sight even, to the general reader, and possess no popular name whatsoever; and as only a few insignificant details are known of the habits of the animals composing them, their treatment in the volume before us has necessarily been to a large extent anatomical. This circumstance renders the book of especial value to students, more particularly as in some cases the articles on the groups in question are the first comprehensive ones dealing with their respective subjects.... Most of the articles are of a very high order of merit—taken as a whole, it may be said that they are by far the best which have as yet been published.... We may say with confidence that the same amount of information, within the same compass, is to be had in no other zoological work."

NATURAL SCIENCE.—"This second volume of the Cambridge Natural History is certain to prove a most welcome addition to English Zoological literature. It deals with a series of animal groups, all deeply interesting to the specialist in morphology; some important from their economic relations to other living things, others in their life-histories rivalling the marvels of fairy-tales. And the style in which they are here treated is also interesting; history and the early observations of the older writers lend their charm; accounts of habits and mode of occurrence, of life, in a word, from the cradle to the grave, are given in ample detail, accompanied by full references to modern and current literature. The whole is admirably illustrated."

SHELLS

VOLUME III.

Molluscs and Brachiopods. By the Rev. A. H. Cooke, M.A., A. E. Shipley, M.A., F.R.S., and F. R. C. Reed, M.A.

TIMES.—"There are very many, not only among educated people who take an interest in science, but even among specialists, who will welcome a work of reasonable compass and handy form containing a trustworthy treatment of the various departments of Natural History by men who are familiar with, and competent to deal with, the latest results of scientific research. Altogether, to judge from this first volume, the Cambridge Natural History promises to fulfil all the expectations that its prospectus holds out."

FIELD.—"We know of no book available to the general reader which affords such a vast fund of information on the structure and habits of molluscs."

KNOWLEDGE.—"If succeeding volumes are like this one, the Cambridge Natural History will rank as one of the finest works on natural history ever published."

ATHENÆUM.—"The series certainly ought not to be restricted in its circulation to lecturers and students only; and, if the forthcoming volumes reach the standard of the one here under notice, the success of the enterprise should be assured."