RHEBAS(Πήβας), a very small river on the coast of Bithynia, the length of which amounts only to a few miles; it flows into the Euxine, near the entrance of the Bosporus, north-east of Chalcedon, and still bears the name of Riva. (Scvlax, p. 34; Dionys. Per. 794; Ptol. 5.1.5; Arrian, Peripl. P. E. p. 13; Marcian, p. 69; Plin. Nat. 6.1; Steph. B. s. v.) This little river, which is otherwise of no importance, owes its celebrity to the story of the Argonauts. (Orph. Arg. 711; Apollon. 2.650, 789.) It also bore the names of Rhesaeus and Rhesus (Plin. l. c.;Solin. 43), the last of which seems to have arisen from a confusion with the Rhesus mentioned by Homer.
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