 This has survived in abbreviated form as "CA" in naming the subfields of the hippocampus.Another reference appeared with the term "pes hippocampi", which may date back to Diemerbroeck in 1672, introducing a comparison with the shape of the folded back forelimbs and webbed feet of the mythological hippocampus, a sea-monster with a horse's forequarters and a fish's tail.The hippocampus was then described as "pes hippocampi major", with an adjacent bulge in the occipital horn, described as the "pes hippocampi minor" and later renamed as the calcar avis.