The Upper Silurian period—General succession of the Upper Silurian deposits of Wales—Upper Silurian deposits of North America—Life of the Upper Silurian — Plants — Protozoa — Graptolites — Corals — Crinoids — General structure of Crinoids — Star-fishes — Annelides — Crustaceans — Eurypterids — Polyzoa — Brachiopods — Structure of Brachiopods — Bivalves and Univalves — Pteropods — Cephalopods — Fishes — Silurian literature.

[ CHAPTER XI.]

The Devonian period—Relations between the Old Red Sandstone and the marine Devonian deposits—The Old Red Sandstone of Scotland—The Devonian strata of Devonshire—Sequence and subdivisions of the Devonian deposits of North America—Life of the period — Plants — Protozoa — Corals — Crinoids — Pentremites — Annelides — Crustaceans — Insects — Polyzoa — Brachiopods — Bivalves — Univalves — Pteropods — Cephalopods — Fishes — General divisions of the Fishes—Palæontological evidence as to the independent existence of the Devonian system as a distinct formation—Literature.

[ CHAPTER XII.]

The Carboniferous period—Relations of Carboniferous rocks to Devonian—The Carboniferous Limestone or Sub-Carboniferous series—The Millstone-grit and the Coal-measures—Life of the period—Structure and mode of formation of Coal—Plants of the Coal.

[ CHAPTER XIII.]

Animal life of the Carboniferous period — Protozoa — Corals — Crinoids — Pentremites — Structure of Pentremites — Echinoids — Structure of Echinoidea — Annelides — Crustacea — Insects — Arachnids — Myriapods — Polyzoa — Brachiopods — Bivalves and Univalves — Cephalopods — Fishes — Labyrinthodont Amphibians—Literature.

[ CHAPTER XIV.]

The Permian period — General succession, characters, and mode of formation of the Permian deposits — Life of the period — Plants — Protozoa — Corals — Echinoderms — Annelides — Crustaceans — Polyzoa — Brachiopods — Bivalves — Univalves — Pteropods — Cephalopods — Fishes — Amphibians — Reptiles — Literature.

[ CHAPTER XV.]