XVIU DESCRIPTION OF THE PLATES AND WOOD-CUTS. 



out near the foot of Wren's Nest Hill ; b, the arrangement of the lime- 

 stone strata at Dudley Castle Hill; d, a hill capped with basalt. In this 

 section the proportion of distance has been disregarded, for the same reason 

 as in Plate II. fig. 4. 



Plate IV. 



Fig. 1. Arrangement of the strata from Sheffield, in Yorkshire, to Castleton, in 



Derbyshire. (See page .50.) 

 Fig. 2. Coal strata, arranged in basin-shaped concavities, and intersected by a fault. 



(See page 105.) 



Fig. 3. Coal strata thrown up by a broad dyke. (See Chap. VIII.) 



Fig. 4. Metallic veins, a a, a vein divided by the vein h h ; c c, a pipe vein. 



Fig. 5. Metallic veins in limestone, cut through by toadstone. 



Plate V. 



The gigantic Trilobite, and two smaller species. 



Plate VI. 



Map of the geology of England and Wales, and a section of the Vale of Thames* 



Plate VII. 



A section of England through Durham and Cumberland ; a group of columnar 

 trap rocks, Cader Idris ; sections of ground plans of metallic veins, &c. 



Plate VIII. 



Living illustrations of fossil conchology : — 

 Fig. 1. Cuttle-fish, or Sepia. 



2. Beak of a Sepia. 



3. The Nautilus Pompilius and its shell. 



4. A Scaphite. 



5. A Hamite. 



6. Cornu Ammonis, or ammonite. 



7. Indented partitions of an ammonite. 



8. Baculite. 



9. Belemnite. 



10. Turrilite. 



11. Spirula. 



12. Orthoceratite. 



13. Nummulite. 



14. Hippurite. 



15. The animal and shell of a Buccinum. 



16. Animal and shell of a Bucardium. 



17. A living Pentacrinus. 



18. The mouth and excretory organ of the Pentacrinus. 



) ' WoOD-CUTS. 



Vignette of the Valley of Sixt, in Savoy. (See the Title Page.) 



Stratified and unstratified limestone at Clouds Hill, ... 91 



Arched stratification of Crich Cliff, Derbyshire, - - - - 96 



Basaltic dyke expanded on the surface, 138 



Section of the secondary formations, - - - . _ . 16O 



Lily encrinite, 164 



Arms of the Briarean pentacrinite, 180 



Restored skeleton of the ichthyosaurus, 181 



Restored skeleton of the plesiosaurus, ih. 



Map of the Wealden beds in Sussex, 192 



Teeth of the iguanodon, 195 



Profile of a crocodile's head found in the Isle of Sheppey, - - 223 



Front view of the same head, - - - - - - ' ib. 



Fossil tooth of the mastodon in the coal of Alpnach, - 225 



Extinct volcano of Pariou, 271 



Abymes de Myans, 317 



Fossil tooth of the great mastodon and the elephant, . . - 330 



Fossil tooth of the rhinoceros and the hippopotamus, - - - 331 



