CONTENTS. 



CHAPTER XIV. 



Mutual Affinities of Organic Beings : Morphology : 

 Embryology : Kudimentary Organs. 



CLASSIFICATION, groups subordinate to groups — Natural system — Rules 

 and difficulties in classification, explained on the theory of descent 

 with modification — Classification of varieties — Descent always used 

 in classification — Analogical or adaptive characters — Affinities, 

 general, complex, and radiating — Extinction separates and defines 

 groups — Morphology, between members of the same class, between 

 parts of the same individual — Embryology, laws of, explained by 

 variations not supervening at an early age, and being inherited at a 

 corresponding age — Rudimentary organs ; their origin explained — 

 Summary Page 363-403 



CHAPTER XV. 



RECAPITULATION AND CONCLUSION. 



Recapitulation of the objections to the theory of Natural Selection — 

 Recapitulation of the general and special circumstances in its favour 

 — Causes of the general belief in the immutability of species — 

 How far the theory of Natural Selection may be extended — 

 Effects of its adoption on the study of Natural History — Con- 

 cluding remarks 404—429 



Glossary of Scientific Term 430 



Index >, 443 



