Polycyttaria–Vereins-Strahlinge from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress.… https://www.rawpixel.com/image/2272311/free-illustration-image-ernst-haeckel-radiationFree Image from public domain licenseDiscoidea–Scheiben-Strahlinge from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress.… https://www.rawpixel.com/image/2272227/free-illustration-image-ernst-haeckel-vintage-marine-lifeFree Image from public domain license