PART II.
HISTORICAL PALÆONTOLOGY.
The Laurentian and Huronian periods—General nature, divisions, and geographical distribution of the Laurentian deposits—Lower and Upper Laurentian—Reasons for believing that the Laurentian rocks are not azoic based upon their containing limestones, beds of oxide of iron, and graphite—The characters, chemical composition, and minute structure of Eozoön Canadense—Comparison of Eozoön with existing Foraminifera—Archœosphœrinœ—Huronian formation—Nature and distribution of Huronian deposits—Organic remains of the Huronian—Literature.
The Cambrian period—General succession of Cambrian deposits in Wales—Lower Cambrian and Upper Cambrian—Cambrian deposits of the continent of Europe and North American—Life of the Cambrian period — Fucoids — Eophyton — Oldhamia — Sponges — Echinoderms — Annelides — Crustaceans — Structure of Trilobites—Brachiopods—Pteropods, Gasteropods, and Bivalves—Cephalopods—Literature.
The Lower Silurian period—The Silurian rocks generally—Limits of Lower and Upper Silurian—General succession, subdivisions, and characters of the Lower Silurian rocks of Wales—General succession, subdivisions, and characters of the Lower Silurian rocks of the North American continent—Life of the period — Fucoids — Protozoa — Graptolites — Structure of Graptolites — Corals — General structure of Corals — Crinoids — Cystideans — General characters of Cystideans — Annelides — Crustaceans — Polyzoa — Brachiopods — Bivalve and Univalve Molluscs—Chambered Cephalopods—General characters of the Cephalopoda—Conodonts.