Prochyta (modern Procida): a small (3.5 kilometers long) barren island not far from Baiae. Formed by four collapsed craters of tufa and pumice-stone, it sits in the Bay of Naples opposite Cape Misenum, slightly north and east of the larger island of Ischia, which both Ovid in Metamorphoses 14.89, and Vergil at Aeneid 9.715, name as Inarime, and mention together with Prochyta.
Juvenal refers to the island as a kind of Siberia. Even today it remains underdeveloped, as a result of its rugged terrain, with a population of some 10,500 inhabitants, who fish, till vinyards, or earn their living at sea.