INDEX. 



vii 



27. Haytor, Dartmoor, Devon . . 303 



28. The Logging Stone, St. Levins 



ComwaU 303 



29. Blackistone, Dartmoor . . .304 



30. Joints in Granite, Eastern Face 



of Old Quariy, near Haytor. 305 



31. Eastern Face of New Qnarry, 



Haytor 305 



32. Portion of Eastern Face of 



New Quarry, Haytor . . . 306 



33. OutKnes of Rock-basins on 



Haytor 309 



34. Spirifera convoluta, from the 



Carboniferous Limestones of 

 Thomeley 314 



35. Ideal Section of Mount Etna, 



to illustrate the theory of a 

 double axis of elevation . .318 



36. Non-parallel Lavas, Northern 



Escarpment of the Yal del 

 Bove 320 



37. Curvatures in the Lavas of 



Zoccalaro 320 



38. Map of Etna, the Yal del Bove, 



and the Coast of Ripesto . 321 



39. Fm-rows of Aqueous Erosion 



on the Cone of Tengger . . 322 



40. Basins near the Blackistone 



Rock 369 



41. Scolithus linearis, fi'om an 



American specimen . . . 388 



42. LiugTda Davisii 422 



43. Olenus micrurus 423 



44. Ag-nostus pisiformis . . .423 



45. Paradosides Forchhammeri (?) 



from British strata . . . 424 



46. Hymenocaiis vermicauda . . 424 



47. Paradoxides Forchhammeri 



(of Angehn) 425 



48. Olenus bisulcatus .... 426 



49. Olenus humihs 426 



50. Olenus scarabBeoides (British 



specimen) 426 



51. Olemis scarabgeoides (ofWah- 



lenberg) 426 



52. Radiating Crystals in Brec- 



ciated Ore-Yein .... 428 



53. Banded Form of Ore-Yein . 428 



54. Ossiferous Cavern, at Oreston 436 



55. Ossiferous Fissure, at Oreston 441 



56. Specimens, of Stem-Plates of 



Bourgueticrhius .... 449 



57. Terebratida elongata, interior 



of Dorsal Yalve of .... 472 



58. Terebratula vitrea, interior of 

 Dorsal Yalve of 472 



59. Terebratula hastata, interior of 

 Dorsal Yalve of, 473 



LIST OF PLATES. 



PLATE. PAGE. 



1. Comparative Tabular Sections of Foreign and British Upper OoHtic, 



Wealden, and Neocomian Beds 1 



II. Worm Tracks (?) from Strata near Beadnell 66 



III. Various Species of Productidee and Strophomenidse 97 



lY. Yarious Species of Productida3 and Strophomenidge 97 



Y. Phacops caudatus, from the Limestone of Dudley 160 



YI. Fossil Raiu-Drops from the " Bottom-Rocks " of the Longmynd . . 182 



YII. Ripple-Marks, Sun-Cracks, Rain-Drops abraded by the Surf, and 

 Worm-Holes in the Sheltered HoUows — from the " Bottom Rocks" 



of the Longmynd 186 



YIII. Oldhamia antiqua — from Bray Head (Frontisxnece) 



IX. Patella vulgaris and Balani, on a fragment of the Outcrop of a Lead- 



Yein from Llantrissant 247 



X. Mwyndy Iron-Mine, near Llantrissant 249 



XL Section of Hsematite and Manganese Mine, Guar Coch, near Bridgend 256 



XII. Yarious Species of Carboniferous Brachiopoda 461 



