Mestre: daughter of Erysichthon / wife of Autolycus
    Ovid's account of Erysichthon is a tale told by the famous shape-shifter Achelous (Ov. Met). 8.725-878). The river-god begins by mentioning two persons to whom the right (ius transire figuras) was granted, i.e. to Proteus and to "the wife of Autolycus, the daughter of Erysichthon" (738). After this introduction, Achelous apparently forgets, as an old man might, to get to the point and diverges into the story of the girl's father instead. She is actually not named in Ovid's account; but the scholiast in Lycrophron's Alexandra names her as does Hesiod's Catalogue of Women, 43 a MW, cf. link upper left of this page.
    Mestre, according to Ovid's 'Achelous, received the capacity to shape-shift by Neptune when she asked for it. She notes that he owes her this gift in exchange for her virginity which he had at some past time taken from her. The god transforms the girl into a fisherman and leaves her to be transformed into a mare, a bird, a heifer, a deer, or whatsoever creature would be needful. In her transformia she thus becomes saleable for her father and indirectly servicable for him to satiate momentarily his massive hunger.
    The Hesiodic Ehoiai (i.e. Catalog of Women) and Philodemus say that Mestre was the lovely daughter of Aithon (the "blazer")=Erysichton. Callimachus' Erysichthon (Hymn VI to Demeter) is a young man, therefore childless. Mestre's character is hardly main-stream classical mythology, a personage over overlooked by Apollodorus and not even picked up by Graves despite thorough references to Autolycus and Erysichthon.

See also Poseidon, loves of