CYTHE´RIUS(Κυθήριος, Strab. 8. p. 356; Κύθηρος, Paus. 6.22.6), a small river in Pisatis in Elis, flowing by Heracleia, and falling into the Alpheius on its right bank: identified by Leake, with the river of Strefi;by Boblaye, with the river of Landsoï. (Leake, Morea, vol. 2. p. 192; Boblaye, Recherches, p. 129.)