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 detailed illustration showcasing various shell specimens, predominantly featuring top-down and side views of several types. The top section presents two larger shells, each labeled and displaying intricate textures and patterns on their surfaces. Below are numerous smaller shells arranged systematically, each also labeled with corresponding numbers for identification. The composition includes a variety of shapes, from rounded to elongated forms, highlighting the diversity in shell morphology. This arrangement serves as a reference for studying the characteristics and classifications of these marine organisms.