This is a vintage scientific illustration of jellyfish anatomy. The illustration is on a pale yellow background and features numerous detailed diagrams of jellyfish, numbered from 1 to 12. The diagrams showcase various aspects of jellyfish anatomy, including their bell-shaped bodies, tentacles, and internal organs. The illustration is likely from a historical scientific text or research document, showcasing the study of marine biology and zoology. The style is detailed and precise, typical of vintage scientific illustrations.