CONTENTS. xi 



ARTICLE XII. 



DURATION AND ORIGINATION OF RACK AND SPECIES. 



Ma 



FART I. Do Varieties in Plants wear out, or tend to wear out ? 



The Question considered in the Light of Facts, and in that of 

 the Darwinian Theory. Conclusion that Races sexually propa- 

 gated need not die of Old Age. This Conclusion inferred 

 from the Provisions and Arrangements in Nature to secure 

 Cross-Fertilization of Individuals. Reference to Mr. Darwin's 

 Development of this View ...... 338 



PART II. Do Species wear out, and, if not, why not ? Implication 

 of the Darwinian Theory that Species are unlimited in Exist- 

 ence. Examination of an Opposite Doctrine maintained by 

 Naudin. Evidence that Species may die out from Inherent 

 Causes only indirect and inferential from Arrangements to 

 secure Wide Breeding. Physiological Import of Sexes. 

 Doubtful whether Sexual Reproduction with Wide Breeding 

 is a Preventive or only a Palliative of Decrepitude in Species. 

 Darwinian Hypothesis must suppose the Former . . 347 



ARTICLE XIII. 



EVOLUTIONARY TELEOLOGY. 



The Opposition between Morphology and Teleology reconciled by 

 Darwinism, and the Latter reinstated. Character of the New 

 Teleology. Purpose and Design distinguished. Man has no 

 Monopoly of the Latter. Inference of Design from Adap- 

 tation and Utility legitimate ; also in Hume's Opinion irresisti- 

 ble. The Principle of Design, taken with Specific Creation, 

 totally insufficient and largely inapplicable ; but, taken with 

 the Doctrine of the Evolution of Species in Nature, applicable, 

 pertinent, and, moreover, necessary. Illustrations from Abor- 

 tive Organs, supposed Waste of Being, etc. All Nature being 

 of a Piece, Design must either pervade or be absent from the 

 Whole. Its Absence not to be inferred because the Events 

 take place in Nature. Illustration of the Nature and Prov- 

 ince' of Natural Selection. It picks out. but does not origi- 



