Myth Library · Regional Variant Cluster
Demeter and Poseidon in Arcadia
1 source witness · 2 source-scoped variants · reviewed 2026-08-30
Pausanias preserves two Arcadian traditions in which Poseidon pursues Demeter. The Thelpusan account explains Demeter Erinys and the birth of the horse Arion, while the Phigalian account belongs to Black Demeter, her withdrawal into a cave, famine, the birth of the distinct goddess Despoina, and rites attached to a local image.
Canonical narrative
At Thelpusa, Pausanias recounts that Demeter, grieving and pursued by Poseidon, takes the form of a mare and mingles with the horses of Oncius. Poseidon recognizes the disguise and takes the form of a stallion. Demeter's anger after the encounter explains the local title Erinys, while bathing in the river Ladon explains a later title of washing. The story also produces the horse Arion in the local tradition.
At Phigalia, Pausanias gives a different local account. Demeter again tries to escape Poseidon in mare form. After the assault she withdraws in anger and grief to a cave, neglecting the cultivated earth until famine threatens humanity. Pan discovers her, and the gods persuade her to relent. The Phigalians connect the story to Black Demeter and to an unusual local image described with a woman's body and horse-like head. They name the daughter born from the encounter Despoina, a separate Arcadian goddess whose own name and rites are not disclosed by the writer.
The two reports share pursuit, equine transformation, divine anger, and local cult explanation, but they are not one identical story. Thelpusa foregrounds Erinys and Arion. Phigalia foregrounds Black Demeter, the cave, famine, Despoina, and a distinctive image. Both preserve sexual coercion and should not be romanticized. Their local titles and offspring must not be imposed on Demeter's worship elsewhere.
Episodes in this myth
Episode 1
Thelpusa, Erinys, and Arion
The mare and stallion pursuit ends in Demeter's anger, her washing in the Ladon, and the local birth of Arion.
Episode 2
The Phigalian cave and Black Demeter
Demeter withdraws into a cave after the assault, famine spreads, Pan finds her, and the local tradition names Despoina and an equine-headed image.
Participants and roles
Demeter
pursued goddess whose equine disguise, anger, withdrawal, and local titles shape both Arcadian variants
The Erinys and Black Demeter forms remain local.Poseidon
pursuer who takes stallion form and assaults Demeter in the Arcadian accounts
The pursuit and assault remain explicit in both local accounts.Despoina
distinct Arcadian daughter named in the Phigalian variant, with rites whose private name Pausanias withholds
Despoina is not treated as an alias of Persephone.Arion
divine horse born in the Thelpusan tradition
His place belongs to the local variant.Source-scoped variants
Thelpusan Demeter Erinys
Demeter becomes a mare, Poseidon pursues her as a stallion, and the aftermath explains Demeter Erinys, washing in the Ladon, and the horse Arion.
What differs: Thelpusa names Arion and the titles Erinys and Lousia; it does not include the Phigalian cave, Black Demeter image, or Despoina.
Greek Roman Imperial · ThelpusaPhigalian Black Demeter
After Poseidon's assault, Demeter withdraws into a cave, the earth fails, Pan finds her, and the gods persuade her to relent.
What differs: Phigalia names Despoina and preserves an equine-headed image of Black Demeter rather than Thelpusa's Arion tradition.
Greek Roman Imperial · PhigaliaSource witnesses
EXPLICIT PRIMARY · Reviewed
Description of Greece
Pausanias; Spiro Greek edition and Jones/Ormerod translation volumes · 1935
Book 8 · Chapter 25 and 42 · Section 8.25.4-10; 8.42.1-7
Second-century regional report preserving two distinct local Arcadian traditions.
Open reviewed source