Achelous and Heracles

In the classical genealogical tradition Achelous appears among the named Rivers (Hyginus' lists), locating him within the class of personified waterways. The specific wrestling episode—where Heracles contests Achelous for Deianira and ultimately snaps a horn from the river‑god—is recounted in later mythographic retellings (as preserved in sources used by compilers such as Bulfinch) and forms an etiological account for the origin of the cornucopia and for cultural readings of human control over waterways.

Classical personifications present Achelous as a river deity; later summaries and retellings emphasize his protean ability to assume forms. In the tradition cited he is described as taking a horned bull form at floodtime. Modern artistic representations (notably Thomas Hart Benton’s mural drawing on Bulfinch’s retelling) depict the episode as a muscular Heracles wrestling the horned bull form, with the horn physically snapped off to become the cornucopia.

Achelous is described as protean, able to change shape (explicitly into a bull in the cited tradition), and as embodying the dual functions of a river: providing life‑giving irrigation in ordinary conditions and becoming destructive during floods. In the mythic episode his physical power is such that Heracles must wrestle him to subdue the flood threat; the snapping of the horn is the narrated result that transforms into a cultural symbol of abundance. Heracles’ role in the episode is that of the heroic human force that subdues or conquers the river‑power.