Arcana, or The Museum of Natural History, London, 1811, Natural History, Pictorial Works, Monoculithos Gigantea, An intricately detailed illustration of a fossilized organism known as Monoculithus. The specimen is characterized by its elongated, segmented structure, which features a series of ridges and grooves that outline its distinctive shape. The top part displays a unique head structure, adding to its remarkable appearance. The illustration is accompanied by a label identifying the organism and credits to the artist and the engraver, showcasing the scientific interest in paleontology during the period of its creation. This depiction provides insight into the ancient marine life that once inhabited the Earth.