xxiv LIST OF ILLUSTRATIONS. 



No. Page 

 99. 1 



> Dudley coal-field, general relations of before and after elevation 465 



1 Wren's Nest, Dudley, ground plan and transverse section of 484 



i.K)Z, J 



103. Wren's Nest, Dudley (southern end), view of 485 



104. Rowley Hills, basaltic quarry, view of 497 



Y^' 1 Faults in the Dudley coal-field near the trap of Barrow Hill ....... I 500 



106. J 3 1 [504 



107. Gravel and sand near Shrewsbury, section of 526 



108. Sea-shells with sand and gravel near Shrewsbury (section) 531 



109. Ice-floes in the Pacific, view of 541 



110. Tyrolese Alps, section across 544 



111. Raised beach, section of 547 



112. "Southstone Rock," a travertine deposit, view of 559 



MAPS ACCOMPANYING THIS WORK. 



1. Map of the Silurian Region, geologically coloured (detached). 



2. Small Map of England, divided into Geological Systems (corner of the large Map). 



3. Map (small) of North American Lakes 152 



4. Ideal Map of the relations of sea and land during the accumulation of the coal-measures 



of the midland counties 152 



5. Map of the Valley of Woolhope and surrounding tract (scale 1 inch to a mile) .... 427 



PLATES IN WHICH THE ORGANIC REMAINS ARE FIGURED. 



Inserted in Part II. 



*' 1 



2. > Fishes of the Old Red Sandstone 587 



2 bis. J 



3. Shells in the lowest beds of the Old Red Sandstone 602 



4. Fishes of the Upper Ludlow Rock 605 



5. Shells of the Upper Ludlow Rock 608 



6. Shells of the Aymestry Limestone or Middle Ludlow Rock 613 



. 1-Trilobites of the Ludlow and Wenlock Rocks (Upper Silurian) 651 



7 bis. J 



8. Shells of the Lower Ludlow Rock 616 



9, ] 



10, r Chambered Shells of the Lower Ludlow Rock ...619 



11. J 



