were often called Despoinai (Δέσποιναι, "the mistresses"). They are the two Great Goddesses of the Arcadian cults, and evidently they come from a more primitive religion. The Greek god Poseidon probably substituted for the companion (Paredros, Πάρεδρος) of the Minoan Great goddess in the Arcadian mysteries. In the Arcadian mythos, while Demeter was looking for the kidnapped Persephone, she caught the eye of her younger brother Poseidon. Demeter turned into a mare to escape him, but then Poseidon turned into a stallion to pursue her. He caught her and raped her. Afterwards, Demeter gave birth to the talking horse Arion and the goddess Despoina ("the mistress"), a goddess of the Arcadian mysteries. In the Orphic "Rhapsodic Theogony" (first century BC/AD), Persephone is described as the daughter of Zeus and Rhea. Zeus was filled with desire for his mother, Rhea, intending to marry her. He pursued the unwilling Rhea, only for her to change into a serpent. Zeus also turned himself into a serpent and raped Rhea, which resulted in the birth of Persephone. Afterwards, Rhea became Demeter. Persephone was born so deformed that Rhea ran away from her frightened, and did not breastfeed Persephone. Zeus then mates with Persephone, who gives birth to Dionysus. She later stays in her mother's house, guarded by the Curetes. Rhea-Demeter prophecies that Persephone will marry Apollo. This prophecy does not come true, however, as while weaving a dress, Persephone is abducted by Hades to be his bride. She becomes the mother of the Erinyes by Hades. In Nonnus's Dionysiaca, the gods of Olympus were bewitched by Persephone's beauty and desired her. Hermes, Apollo, Ares, and Hephaestus each presented Persephone with a gift to woo her. Demeter, worried that Persephone might end up marrying Hephaestus, consults the astrological god Astraeus. Astraeus warns her that Persephone will be ravished and impregnated by a serpent. Demeter then hides Persephone in a cave; but Zeus, in the form of a serpent, enters the cave and rapes Persephone. Persephone becomes pregnant and gives birth to Zagreus. It was said that while Persephone was playing with the nymph Hercyna, Hercyna held a goose against her that she let loose. The goose flew to a hollow cave and hid under a stone; when Persephone took up the stone in order to retrieve the bird, water flowed from that spot, and hence the river received the name Hercyna. This was when she