Les, mollusques, marins, du, Roussillon, Paris, J.-B, Baillière, 1882-1898, France, mollusks, Roussillon, province, This illustration presents a series of detailed views of various marine bivalves from the species Pelecyopodes. Each specimen is labeled with a number, showcasing different shapes and sizes of shells, which range from oval to more elongated forms. The shells exhibit intricate patterns and textures, highlighting the diversity within this classification. Accompanying the visual representations are references to their scientific names and origins, root in the study of mollusks from the Roussillon region. The overall arrangement emphasizes the beauty and complexity of these marine organisms.