Faune du calcaire carbonifère de la Belgique Bruxelles, F. Hayez, impr, 1878-87, Belgium, Brachiopod fossil, Carboniferous, Fishes fossil, Mollusks fossil, Paleontology, Fossils, Sea, Ocean, Shells, A collection of intricate illustrations showcasing various species of bivalve shells. Each shell is presented from different angles, emphasizing the distinct shapes and detailed patterns of their surfaces. The illustrations highlight the symmetrical forms and radiating lines characteristic of these marine organisms. The arrangement of the shells contributes to a comprehensive study of their morphology, likely sourced from a scientific publication focused on marine biology or malacology. The numbered plate suggests its origin from a historical reference work, contributing to the documentation of natural history.