CONTENTS. il 



CHAPTER XIV. 



MUTUAL AFFINITIES OF ORGANIC BEINGS : MORPHOLOGY : EMBRYOLOGY; 

 RUDIMENTARY ORGANS 



CLASSIFICATION, groups subordinate to groups Natural system Rules and 

 difficulties in classification, explained on the theory of descent with modifi- 

 cation Classification of varieties Descent always used in classification 

 Analogical or adaptive characters Affinities, general, complex, and 

 radiating Extinction separates and defines groups MORPHOLOGY, be- 

 tween members of the same class, between parts of the same individual 

 EMBRYOLOGY, laws of, explained by variations not supervening at any early 

 age, and being inherited at a corresponding age RUDIMENTARY ORGANS ; 

 their origin explained Summary . . . . . . . . Page 340 



CHAPTER XV. 

 RECAPITULATION AND CONCLUSION 



Recapitulation of the objections to the theory of Natural Selection Recapitu- 

 lation 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 Concluding remarks . . . . . . 379 



GLOSSARY OF SCIENTIFIC TERMS . . . . . . . . . . 405 



INDEX , 417 



INSTRUCTION TO BINDER. 



The Diagram to front page 84, and to face the latter part of the Volume. 



