Orsinio compares himself to Actaeon of Greek mythology, who after a day of hunting, happened to see the chaste goddess Diana naked. Diana punished him by transforming Actaeon into a hart (a stag), which was then pursued and torn to pieces by Actaeon's own hound dogs.
In the painting below, Actaeon's head and feet have been transformed, and Diana herself has joined in the chase. The Death of Actaeon by Titian