CONTENTS. 



CHAPTER L 



INTBODUCTOBT. 



The Problem of the Genesis of Species stated. Nature of its Probable Solution. Im- 

 portance of the Question. Position here defended. Statement of the DAKWTN-IAX 

 THEOBY. Its Applicability to Details of Geographical Distribution ; to Rudimentary 

 Structures; to Homology; to Mimicry, etc. Consequent Utility of the Theory. 

 Its "Wide Acceptance. Reasons for this, other than, and in Addition to, its Scientific 

 Value. Its Simplicity. Its Bearing on Religious Questions. Odium Theologicum 

 and Odium Antith^ologicum. The Antagonism supposed by many to exist be- 

 tween it and Theology neither necessary nor universal Christian Authorities in 

 iavor of Evolution. Mr. Darwin's "Animals and Plants under Domestication." 

 Difficulties of the Darwinian Theory enumerated . . . . p. 13 



CHAPTER II. 



THE INCOilPETENCY OF "NATURAL SELECTION " TO ACCOUNT FOB THE IN- 

 CIPIENT STAGES OF USEFUL STEUCTUBES. 



Mr. Darwin supposes that Natural Selection acts by Slight Variations. These must be 

 useful at once. Difficulties as to the Girafie ; as to Mimicry ; as to the Heads of 

 Flat-fishes ; as to the Origin and Constancy of the Vertebrate limbs ; as to Whale- 

 bone ; as to the Young Kangaroo ; as to Sea-urchins ; ag to Certain Processes of 

 Metamorphosis ; as to the Mammary-gland ; as to Certain Ape Characters ; as to 



