CONTENTS. 



xix 



CHAPTER XL. 



SUPERFICIAL DEPOSITS (continued). 



Page 



Early condition of the surface after elevation from beneath the sea. — Lacustrine and broad river period.-— 



Passage to present condition. — Remains of extinct species of quadrupeds. — Ancient river deposits.. . 548 



CHAPTER XLI. 



SUPERFICIAL ACCUMULATIONS (concluded). 



Terrestrial changes within the modern sera. — Desiccation of lakes and turbaries. — Modern action of rivers. 

 — Accumulations of blown sand. — Exposure of submerged forests. — Formation of shell marl and 

 travertine 558 



CHAPTER XLII. 



CONCLUSION OF PART I.— GENERAL VIEW OF THE FORMER CHANGES OF THE 



SURFACE. 



Parallelism and divergence of mountain chains. — Ancient dislocations, and their intensity. — Vastness of 

 scale of former depositary action. — Central heat. — Ancient dislocations and modern changes re- 

 conciled 568 



PART II. 



ORGANIC REMAINS. 



CHAPTER XLIII. 



Introductory View of the Distribution of Organic Remains in the Older Formations 579 



CHAPTER XLIV. 



ORGANIC REMAINS OF THE OLD RED SYSTEM. 

 Introduction.— Fishes (Pis. 1, 2, 2 Us.)— Mollusca, &c. (PI. 3.) 587 



CHAPTER XLV. 



FISHES AND SHELLS OF THE LUDLOW AND WENLOCK FORMATIONS, OR UPPER SI- 

 LURIAN, ROCKS. 



Fishes, &c, of the Upper Ludlow Rock, PI. 4. — Shells of the Upper Ludlow Rock, PI. 5. — Shells of the 

 Aymestry Limestone, PI. 7.— Shells of the Lower Ludlow Rock, PI. 8—11. — Shells of the Wenlock 

 Limestone and Shale, PL 12, 13 605 



c 2 



