Psilion

Psyllium (Ancient Greek: Ψύλλιον or Ψύλλειον), or Psylla (Ψύλλα) was a fortified emporium on a river of the same name. It was located on the Pontus Euxinus in ancient Bithynia between Artanes and Kalpe. The Tabula Peutingeriana calls it Philium.