Mémoires sur les animaux sans vertèbres Paris G. Dufour 1816 Invertebrates Woods Hole, This illustration features a detailed anatomical study of marine organisms from the genus Tethys, showcasing various forms and structures. The top section presents a symmetrical view of several specimens, emphasizing their intricate patterns and textures. Below, multiple detailed drawings reveal the different parts of the organisms, including their shells, body structure, and reproductive features. The various numbered labels correspond to specific anatomical details, providing a clear reference for each illustrated specimen. Overall, the artwork serves as a meticulous representation of biodiversity within marine life, highlighting both complexity and beauty in the depicted forms.