Fossilized skeleton of ichthyosaurus chiropolyostinus. Lithograph by H. O'Neill, 1834. https://www.rawpixel.com/image/13999555/image-paper-cartoon-artFree Image from public domain licenseFossilized head and bone fragments of a chiropolyostinus. Lithograph by H. O'Neil, 18--. https://www.rawpixel.com/image/13981889/image-cartoon-art-animalFree Image from public domain licenseFossilized head of a chiropolyostinus. Lithograph by B.J. Rossiter, 18--. https://www.rawpixel.com/image/13991069/fossilized-head-chiropolyostinus-lithograph-bj-rossiter-18Free Image from public domain license