viii CONTENTS. 



ARTICLE HI. 



NATURAL SELECTION NOT INCONSISTENT WITH NATURAL THEOLOGT. 



PAGE 



PART I. Premonitions of Darwinism. A Proper Subject for 

 Speculation. Summary of Facts and Ideas suggestive of Hy- 

 potheses of Derivation 87 



PART n. Limitations of Theory conceded by Darwin. What Dar- 

 winism explains. Geological Argument strong in the Tertiary 

 Period. Correspondence between Rank and Geological Suc- 

 cession. Difficulties in Classification. Nature of Affinity. 

 No Absolute Distinction between Vegetable and Animal King- 

 doms. Individuality. Gradation ..... 104 



PART in. Theories contrasted. Early Arguments against Darwin- 

 ism. Philosophical and Theological Objections. Theory may 

 be theistic. Final Cause not excluded. Cause of Variation 

 unknown. Three Views of Efficient Cause compatible with 

 Theism. Agassiz's Objections of a Philosophical Nature. 

 Minor Objections. Conclusion 129 



ARTICLE IV. 



AS TO VARIATION, GEOGRAPHICAL DISTRIBUTION, AND SUCCESSION. 



Alphonse De Candolle's Study of the Oak Genus. Variability of 

 the Species. Antiquity. A Common Origin probable. Dr. 

 Falconer on the Common Origin of Elephants. Variation and 

 Natural Selection distinguished. Saporta on the Gradation be- 

 tween the Vegetable Forms of the Cretaceous and the Tertiary. 

 Hypothesis of Derivation more likely to be favored by Bot- 

 anists than by Zoologists. Views of Agassiz respecting the 

 Origin, Dispersion, Variation, Characteristics, and Successive 

 Creation of Species contrasted with those of De Candolle and 

 others. Definition of Species. Whether its Essence is in the 

 Likeness or in the Genealogical Connection of the Individuals 

 composing a Species 178 



