Erinys was a chthonic goddess of wrath, who according to legend was a consort of Poseidon by whom she bore the famous horse Areon. Some speculate that by implication, she may also have been a grim material figure who engendered all horses. She may be equated with a wrathful Demeter who is occasionally given the epithet of Erinys. Erinys appears in the collective form of three Erinys; snake-locks cover their heads, signifying the underworld. In the Iliad they are described as those “who beneath the earth punish dead men, whoever has sworn a false oath.” They are the Furies in Roman mythology. A.G.H.
Jordan, Michael, Encyclopedia of Gods, New York, Facts On File, Inc. 1993, p. 78