Thirty-eight years later, Schlegel (1858) used the name Spongia (Poterion) Neptuni, probably with no knowledge of Hardwicke (1820 & 1822), for a sponge universally considered to be identical to Hardwicke’s Spongia patera. Poterion refers to a cup or
drinking vessel, and derived from “piðnw”, a Greek word meaning