IV CONTENTS. 



PROOFS, ILLUSTRATIONS, AUTHORITIES, ETC. 



PAGE 



1. Natural Law i 



2. The Laplacian Cosmogony iii 



3. There was Dry Land long before the occurrence of the first 



Fossils of Land Plants and Animals iv 



4. There are Species common to different Formations, and an 



unbroken Succession of Animal Life from the beginning 



to the present Epoch iv 



5. The Lower Silurian Formation is the Record of an Era of 



Invertebrate Animals vi 



6. The Genera of the Lower Silurian Formation are humble in 



their respective lines of Gradation vii 



7. The early Fishes were low, both with respect to their class 



as Fishes, and the Order to which they belong .... viii 



8. In all the Orders of Ancient Animals there is an ascending 



gradation of character from first to last xi 



9. There is a succession from Low to High Types in Fossil 



Plants, from the earliest Strata in which they are found, 



to the highest xxiv 



10. The comparatively large bulk of some of the early Fossils is 



to be regarded as a mark of their inferiority in the scale . xxvi 



11. Variability of Species xxvii 



12. Answers to Objections : 



Mr. Hugh Miller xxxi 



Professor Sedg wick's Preface, etc xliv 



Dr. Hitchcock Iv 



Additional Note adverting to the views of Mr. Charles 



Darwin Ixii 



