X. 
L.IST OF PLATES AND TABLES, 
PAGE 
12 Diagram of dip of Strata of 
equal thickness . . .98 
13 Strata thinning out downwards 99 
14 Strata thickening downwai-ds . 99 
15 Strata thinning out on an old 
uneven sea bed . . 99 
16 Strata thickening downwards 
on an uneven sea-bed . 99 
17 Strata of equal thickness, at an 
angle on uneven sea-bed 100 
18 Coin of Lysimachus with the 
horn of Ammon . . . 112 
19 Section of the Clee Hills at 
Oroton . . . .122 
20 The Elled Patch, Beaufort, 
South Wales . . .126 
21 Section of Rocks from Silurian 
to Oolite . . . .131 
22 Section of Rocks, New Red 
Sandstone, to Lias . .133 
23 Section, AVenlock Limestone, 
and New Red Sandstone 131 
24 Section of the Plain of Thing- 
valla .... 145 
25 Grand Plan of Plain of Thing- 
valla . . . .146 
26 Outline of Calyx of Hydreiono- 
crinus . . . .147 
27 Teeth of Ancliiterium Radegon- 
dense . . . . 1 53 
28 Section of a Geysir . . .176 
29 Plan of Calyx of Hydreiono- 
crinus (?) globularis . . 181 
30 Plan of Calyx of Pisocrinus 182 
PAGE 
31 Section of American Rocks, 
Millstone Grit to Lower 
New Red . . . .188 
32 Section of Carboniferous Rocks 
near Mitcheldean . 226 
33 Sifter for Fossil Microscopic 
and Minute Organisms . 249 
34 Section of Beds of Iron-ore and 
Coal-measures, Forest of 
Dean .... 267 
35 Coal-seams cut by a " Horse," 
Ruardean . . . 268 
36 Drift-bedding in Carboniferous 
Sandstone .... 269 
37 Plan of "Pillar and Stall" 
Workings . . .278 
38 Rhynchonellre from PI. XIIL, 
Phillip's Geology of York- 
sliire . . . .314 
39 Section of Oyster -Deposits at 
Sunderidge . , . 328 
40 Plan of Railway Works . . 341 
41 Ci-oss Section of Tunnel . . 341 
42 Longitudinal Sectionof Railway 
Works S42 
43 Section of Strata, Dundonald 
Colliery . . . .354 
44 Longitudinal Section of Cyrtina 
heteroclyta . . .41/5 
45 Diagram of Anticlinals and 
Synclinals . . . 428 
46 Diagram of Fault . . .429 
47 Spiral Lamellaj of Athyris pco- 
tinifera .... 459 
LIST OF PLATES AND TABLES. 
PAGE 
I. Woodocrinus macrodactylus 12 
11. Woodocrinus expausus ......... 14 
IIL Ammonites communis ......... 112 
Table of British Rocks 120 
Table of Probable Equivalents of the Silurian andCambrianRocks . 138 
IV. Hydreionocrinus ? globularis, H. Woodianus, H. Scoticus, Pisocrinus 
pilula, P. ornatus 148 
V. Panoramic View of North Wales from Cader Idris . . . .169 
VL Remnants cf the First Dry Land, N. America 288 
VII. Oldhamia radiata, the oldest known FossiL (To face Title). . . 240 
VIII. The Devil's Chapel, Forest of Dean . . .' . . . .275 
IX. RhynchoncUa acuta, and Rhynchonella cynoocphala . . . .316 
X. Marbled Paper in Illustration of Ribboned-structure of Gneissic Rocks 364 
Index Map to Geological Survey 389 
XL Plant from Coal. strata of South Wales 448 
XII. 'J'ypical Forms of Brachiopoda, with Spiral Appendages for Oral Arras 472 
y^ 
