Discourses Biological and Geological: Essays

Abiogenesis accumulation Anchitherium ancient animals appear Arctogæal Atlantic body bottom calcareous carbonic acid Carboniferous Carnivora causes Cetacea chalk cilium coal contains cretaceous deep sea deposit depths Devonian Diatoms distribution doctrine doubt dredge dry land earth Eocene essay evidence existence fact fathoms fauna faunæ fermentation fluid Foraminifera formation forms fossil genera geological speculation geologists germs give rise globe Globigerina ooze gradually Heteromita Hipparion hypothesis knowledge known less living lobster Mammalia mammals matter Mediterranean Mesozoic microscope Miocene Miocene epoch modern modification monad naturalist nature observed ocean organisms oxygen palæontology particles Pébrine peculiar period physical plants present day protoplasm Radiolaria red clay regions remains result rocks scientific sea-bottom shells silicious Silurian similar species sporangia spores structure substance sugar suppose surface tertiary things tion Torula trawl Triassic types Ungulata Uniformitarianism vegetable whole Wyville Thomson Xenogenesis yeast zoological zoospores