Per and cui

PER AND CUI. When a writ of entry is brought against a second alienee or descendant from the disseisor, it is said to be in the per and cui, because the form of the writ is that the tenant had not entry but by and under a prior alienee, to whom the intruder himself demised it. 2 Bl. Com. 181. See Entry, writ of.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.