The family of Acalephae, including jellyfishes and medusas. Line block. https://www.rawpixel.com/image/13977445/the-family-acalephae-including-jellyfishes-and-medusas-line-blockFree Image from public domain licenseAbove, a sprig and flowers of a lobelia, two grosbeaks with a nest, an earthworm, a madrepore , a manis, and a madrepore… https://www.rawpixel.com/image/14002296/image-paper-cartoon-flowersFree Image from public domain licensePentacrinus caput medusae (greatly reduced) Atlantic Dredging. by William Hart https://www.rawpixel.com/image/14306935/pentacrinus-caput-medusae-greatly-reduced-atlantic-dredging-william-hartFree Image from public domain license