Considérations générales sur la classe des Crustacés, Paris, F.G. Levrault, 1825, France, Crustacea, Zoology, This illustration features two distinct types of crustaceans from the subclass Malacostraca, specifically focusing on decapods. The top figure displays a detailed representation of a species from the family Ocypodidae, commonly known as the ghost crab, characterized by its long legs and large claws. The bottom figure depicts a member of the family Portunidae, often referred to as the swimming crab, noted for its flattened hind legs adapted for swimming. Both exemplify the diversity and anatomical structure typical of decapods, highlighting their prominent features such as claws and body shape, accompanied by labels identifying each species. The scientific context suggests a focus on zoological classification.