The Old Red Sandstone, Or, New Walks in an Old Field

abundance acquainted Agassiz ancient animal appearance Balruddery beautiful body bone bony Caithness cartilaginous fishes Cephalaspis character Cheiracanthus Cheirolepis Christian Coal Measures coast Coccosteus color composed conglomerate Cornstone covered creature Cromarty crustacean deposit described diluvium Dipterus edge edition enamelled entire exhibited existing feet fins Forfarshire fossils fragments furnished geological geologist gneiss granitic hills Holoptychius huge hundred ichthyolite beds illustration inches interest jaws Lias limestone lower formation Lower Old Red marked mass minute Moray Moray Frith Murchison nodules occur Old Red Sand Old Red Sandstone Oolite organisms osseous Osteolepis peculiar period plates portion present Pterichthys quarry rays reader regarded remains resembling ridge rock scales schists Scotland seems shells shore side Silurian skeleton species specimens spines stone strata stratified clay stratum style surface Sutor tail teeth thick thickly thousand tion trilobite tubercles vegetable vertebral vertebral column volume