Thesaurus conchyliorum, or Monographs of genera of shells London Sowerby 1847-1887 Mollusks Pictorial works Shells, The illustration showcases a variety of marine mollusks from the family Fissurellidae, specifically focusing on the genus Cemerus. Displayed are numerous detailed representations of different species, each characterized by their unique shell shapes, patterns, and textures. The arrangement includes several rows of shells, varying in size and design, with labels identifying each specimen. The intricate details highlight the natural beauty and diversity of these organisms, illustrating features such as ridges, apertures, and coloration that contribute to their classification within marine biodiversity.