Faune du calcaire carbonifère de la Belgique Bruxelles, F. Hayez, impr, 1878-87. Belgium, Brachiopoda fossil, Carboniferous, Fishes fossil, Mollusks fossil, Paleontology, Fossils, Sea, Ocean, Shells, An illustration displaying various types of shells, featuring detailed engravings of different shell structures arranged in a grid format. Each shell is meticulously rendered to showcase its unique shape and texture, with labels indicating their specific classifications. The first row presents shells with distinct features, while the subsequent rows continue to display a diverse range of forms, including variations in size and ribbing. The overall composition serves as a scientific study, highlighting the beauty and complexity of these marine organisms.