Summary[edit] Description: Hipponix antiquatus (Linnaeus, 1767) - lateral view of a white hoof snail shell. Family Hipponicidae - the hoof snails are hard substrate encrusters in shallow-water, high-energy marine environments. Date: 5 March 2011, 00:36. Source: Hipponix antiquatus (white hoof snail) (San Salvador Island, Bahamas) 4. Author: James St. John.