SCIENCE

A TREATISE ON ZOOLOGY. By Prof.

Sir E. Hay Lankester, K.C.B., M. A., LL.U., F.R.S To be corapleted in 10 YoLs. Demy Svo, illustrated.

Now i-eady, price, each, 12s. 6d. net, in paper covers ; or lôs. net, in cloth :

Parti. (First Fasciule). Introduction and Protozoa. Bv Piof. s. .j.

HicKsoN. M. A., F.R.S. ; F. W. Gamble, D.Sc, F.R.S. ; J. J. Lister, F.R.S. ; H. M. WooDCOCK, D.Sc. ; and the late Prof. Weldon.

Part I. (Second Fa.sciele). Introduction and Protozoa. By J. B.

Farmer, D.Sc, M.A., F.R.S.; J. J.

Lister, F.R.S.; E. A. Minchix, M. A. ; and S. J. HiCKKON, F.R.S.

Part II. Tùe Porifera and Cœlentera. By E. A. Minchin, m. a.; G. Herbert Fowler, B.A., Ph.D. ; and Gilbert C. Bournk. M. A.

Part III. The EcMnoderma. By

F. A. Bather, m. a., assisted by J. W. GREGORY,D.Sc..andE.S.GooDmcH,M.A.

Part IV. The Platyhelmia, the Mesozoa, and the Nemertini. By Prof. Benham. D.-f.

Part V. Mollusca. By Dr. Paul

PiLSENEER.

Part VII. (Third Fascicle). CrUStacea. By w. T. Calman, D.Sc.

PartLX. (First Fascicle). Cyclostomes and Fishes (Vertebrata Craniata). By lO. s. Goodrich, F.R.S.

Pricf, Part IX., 15s. net, paper covers ; or 20s.net, in cloth.

DYNAMICS. By Prof. P. G. Tait. Illustivitcd. Crown .Svo, cloth, price 7S. 6d.

THE GRAMMAR OF SCIENCE. By

Professer Rakl Pkaksun, M. A., F.R.S.

Third Editi<jn. Witli 8:i figures in the text. Demy Svo, cloth. Part I. :

Physic.al (now ready). Price 6s. net.

Part II. : Biological (in préparation).

Price 4S. 6d. net. Or complète in one volume. Price lOS. 6d. m-t.

HEREDITY AND SELECTION IN SOCIOLOGY. By G.ChattkrtonHill.

Dutuy ôvo, cloth, price 12s. 6d. net.

SCIENCE (Continued).

THE EVOLUTION OF MIND. By

Joseph McCabe. Large crown Svo, cloth, price 5S. 'let.