

CONTENTS 



PART I. 



PAGES 



i. On variation under domestication, and on the principles 



of selection 1 



ii. On variation in a state of nature and on the natural 



means of selection 4 



iii. On variation in instincts and other mental attributes . 17 



PART II. 



iv. and v. On the evidence from Geology. (The reasons for 

 combining the two sections are given in the Intro- 

 duction) 22 



vi. Geographical distribution 29 



vii. Affinities and classification 35 



viii. Unity of type in the great classes .... 38 



ix. Abortive organs 45 



x. Recapitulation and conclusion 48 



Portrait frontispiece 



Facsimile to face p. 50 



D. 



