viii CONTENTS. 



ARTICLE III. 



NATURAL SELECTION NOT INCONSISTENT WITH NATURAL TUEOLOGY. 



PAGE 



Part I. — Premonitions of Darwinism. — A Proper Subject for 

 Speculation. — Summary of Facts and Ideas suggestive of Hy- 

 potlieses of Derivation . . . , . . . 87 



Part II. — 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 III. — Theories contrasted. — Early Arguments against Darwin- 

 ism. — Philosophical and Theological Objections. — Theory may 

 be thcistic. — 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. 



SPECIES 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 respcctino; 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 



