the chief river of Peloponnese, now called Alfeo, Rofeo, or Roffo. Its sources are in the mountains of Arcadia, in the east of Megalopolis. Being fed by a great number of small streams it becomes navigable, and traversing Elis, empties itself into the Ionian sea. In mythology, the Alpheus, or rather the river god of the same name, acts a very prominent part, especially as the lover of the nymph Arethusa.