LIST OF PLATES. PLATE I. Cambrian Fossils "terpage 40 II. Lower Silurian Fossils .--48 III. Lower Silurian Fossils 80 IV. Lower and UPPER Silurian Fossils ■ ■ • 96 V. Upper Sn.up.iAN Fossils . ■ • .104 VI. Upper Silurian Fossils • • • .112 VII. Upper Silurian Fossils 128 VIII. Devonian Fossils . • • • • •176 IX. Devonian Fossils 200 X. DEVONIAN and Carboniferous Fossils . . 204 XI. Fossils of the Carboniferous Limestone . .216 XII. Carboniferous Fossils 276 XIII. Carboniferous Fossils 280 XIV. Fossils of the Carboniferous Limestone . . 288 XV. Fossils of the Coal-Measures . • • .292 XVI. Permian Fossils 324 XVII. Fossils of the Lower and Middle Lias . . 368 XVIII. Fossils of the Lower AND Middle Lias . 376 XIX. Fossils of the Lower and Middle Lias . . 392 XX. Lower Jurassic Fossils • 408 XXL Lower Jurassic Fossils • 416 XXII. MIDDLE Jurassic Fossils 47°