Successive Deposition indicated by Fossils. — Limestones formed of
Corals and Shells. — Proofs of gradual Increase of Strata derived from
Fossils. — Serpula attached to Spatangus. — Wood bored by Teredina. —
Tripoli formed of Infusoria. — Chalk derived principally from Organic
Bodies. — Distinction of Fresh-water from Marine Formations. — Genera
of Fresh-water and Land Shells. — Rules for recognising Marine
Testacea. — Gyrogonite and Chara. — Fresh-water Fishes. — Alternation
of Marine and Fresh-water Deposits. — Lym-Fiord.