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Of Scientific Interest and Value 



THE COLLECTED ESSAYS OF IN TWO VOLUMES 



ALFRED RUSSEL WALLACE, ILLUSTRATED CLOTH 



LL.D., D.C.L., F.R.S., Etc. CROWN OCTAVO p.OO 



STUDIES SCIENTIFIC AND SOCIAL 



By the author of " The Malay Archipelago," " Natural Selection and Tropical Nature," " Darwinism," etc. 

 In Volume I, 23 Essays are grouped thus : In Volume II, 29 Essays, classed as : 



I-VI. Earth Studies VII, VIII. Descriptive Zoology. I-VII. Educational. 



IX, X. Plant Distribution. VIII-XV. Political. 



XI-XIII. Animal Distribution. XVI-XIX. The Land Problem. 



XIV-XVIII. Theory of Evolution. XX-XXII. Ethical. 



XIX-XXI. Anthropology. XXIII-XXIX. Sociological. 



XXII-XXIII. Special Problems. Send for a circular. 



The statement in untechnical form of the positions reached during recent years by the foremost exponent of 

 what is known as the Darwinian theory of evolution. 



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of Invertebrates. By Dr. E. Kobschelt, in the University of Marburg, and Dr. K. Heider, in the Univer- 

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A TREATISE ON ZOOLOGY 



Edited with an introduction by E. Rat Lankester, M.A., LL.D., F.R.S., Correspondent of the Institute of 

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INTRODUCTION TO ZOOLOGY 



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