Note 1 — XI. Religion
H. W. (Henry William) Auden translation
supinus = ὕπτιος, bent backwards; supinae manus, with the palms turned up. The opposite of supinus is pronus, e.g. puerum imponere equo pronum in ventrem, postea sedentem (Varr.); pecora quae natura prona finxit (Sall.)