[935] δίνῃ πορφύροντα: 'darkly swirling'; cf. Il. 14. 16, πορφύρῃ πέλαγος, where Leaf says, "πορφύρῃ seems to express heaving motion rather than colour (Curtius, Et. 415), but the two meanings are evidently closely allied, as appears from the frequency with which the adj. πορφύρεος is applied to waves." See also on 461. For the current of the Hellespont cf. Il. 12. 30, ἀγάρροον Ἑλλήσποντον, Cat. 64. 358, “rapido Hellésponto.”