A LIBRARY 



OF THE MOST IMPORTANT 



STANDARD WORKS ON EVOLUTION. 



Origin of Species by Means of Natural Selection, or the Preser- 

 vation of Favored Races in the Struggle for Life. By Charles Dak- 

 wis, LL. D., F R. S. New and revised edition, with Additions. 

 12mo. Cloth, $2.00. 



"Personallv and practically exercised in zoology, in minute anatomy, in 

 geology, a student of geographical distribution, not in maps and in mu- 

 seums" but by long vovages and laborious collection ; having largely ad- 

 vanced each of these branches of science, and having spent many years in 

 gathering and sifting materials for his present work : the store of accurately- 

 registered facts upon which the author of the • Origin of Species ' is able to 

 draw at will is prodigious."— Professor T. E. Huxuy. 



IL 



Variation of Animals and Plants under Domestication. By 



Charles Darwis, LL. D., F. R. S. With Blustrations. Revised edi- 

 tion. 2 vols., 12mo. Cloth, $5.00. 



" We shall learn something of the laws of inheritance, of the effects of 

 crossing different breeds, and on that sterility which often supervenes when 

 organic beings are removed from their natural conditions of life, and like- 

 wise when they are too closely interbred." — From the Introduction, 



ILL. 



Descent of Man. and Selection in Relation to Sex. By Charles 

 Darwis, LL. D., F. R. S. With many Illustrations. A new edition. 

 12mo. Cloth, $3.00. 



" In these volumes Mr. Darwin has brought forward all the facts and 

 arguments which science has to offer in favor of the doctrine that man has 

 arisen by gradual development from the lowest point of animal life. Aside 

 from the logical purpose which Mr. Darwin had in view, his work is an 

 original and fascinating contribution to the most interesting portion of nat- 

 ural history." 



LV. 



On the Origin of Species ; or, The Causes of the Phenomena of Or- 

 ganic Nature. By Professor T. H. Huxley, F. R. S. 12mo. Cloth, $1.00. 

 " Those who disencumber Darwinism of its difficulties, simplify its state- 

 ments, relieve it of technicalities, and bring it so distinctly within the hori- 

 zon of ordinary apprehension that persons of common sense may judge for 

 themselves, perform an invaluable service. Such is the character of the 

 present volume." — From the Preface to the American edition. 



V. 



Darrriniana. Essays and Reviews pertaining to Darwinism. By Asa 

 Grat, Fisher Professor of Natural History (Botany) in Harvard Uni- 

 versity. 12mo, Cloth, $2.00. 

 H Although Professor Gray is widely known in the world of science for 



bis botanical researches, but tew are aware that he is a pronounced and un- 



