{Pilton group:-- Clymenia, Cypridina, Chemung and Portage. { Brown calcareous etc. Shales, Sandstones Upper { shales, brown and limestones, and and shales. { yellow sandstone. sandstones. Plants and marine { Land plants and Plants and marine shells. { marine shells. shells. {Ilfracombe group:-- Eifel limestone, Hamilton shales, { Grey and red Calceola shales, and Corniferous Middle { sandstones and etc. or cherty { flags, calcareous Corals, shells, limestone. { slates and etc. Many corals and { limestones, with shells, also { corals, etc. plants. {Lynton group:-- Coblentz and Schoharie and { Bed and purple Wissenbach shales, Caudagalli grits. Lower { sandstones. Marine Rhenish greywacke, Oriskany { shells, etc. Spinier sandstones. { sandstone. Marine shells. { Marine shells. DIVISIONS. MARGINAL AREAS. Scotland. Ireland. Gaspé and New Brunswick. {Yellow and red Yellow and red Red and grey { sandstones. sandstones, etc. sandstones, grits Upper {Fishes and plants. Plants, fishes, and shales, and { etc. conglomerates of { Gaspé and Mispeck. { Plants. {Red shales and Grits and Grey and Red { sandstones, and sandstones of sandstones, and Middle { conglomerates. Dingle. grey and dark {Caithness flags. shales. Gaspé {Fishes and plants. and St. John. { Many plants and { fishes. {Flagstones, shales Glengariff grits, Sandstone and { and conglomerates. etc. conglomerate. Lower {Fishes and plants. Gaspé and St. { John. { Plants and fishes.