Life on the Earth

affinity ages ancient Annelida antiquity appear atmosphere augmented beds Belemnites Brachiopoda British Carbon Carboniferous Cenozoic Cenozoic Strata Cephalopoda Cetacea Chalk classes climate Coal Coal-formation coast Coleoptera Coral Crocodilia Crustacea deposits Dimyaria distribution earlier earliest earth Echinodermata effect epoch equal existing fauna favourable feet Ferns Fishes forms fossil freshwater Gasteropoda genera geological geological periods globe Goniatites greater groups growth heat hypothesis inference Insectivora Insects lakes land land-plants latitudes Lias limestone limited Lingula living Llandeilo Mammalia marine Marsupial mean temperature Mesozoic Mollusca Monomyaria nature number of species occur Oolitic organic origin Paleozoic Paleozoic Strata perhaps period phenomena plants and animals Pleiocene Pleistocene Polyzoa prevalent proportion Purbeck races radiation regard regions remarkable Reptiles rivers rocks sediments shale shells shew Silurian similar Stonesfield Strata structure successive suppose surface Teleosaurus terrestrial Tertiary thickness tion traced Uniformitarian Unionidæ variations warmth waste whole zone Zoophyta