EXPLANATION.

A , The arena. p , The wall or podium inclosing it. P , The podium itself, on which were chairs, or seats, for the senators, . M′ , The first maenianum, or slope of benches, for the equestrian order. M″ , The second maenianum. M‴ , The third maenianum, elevated considerably above the preceding one, and appropriated to the pullati. W , The colonnade, or gallery, which contained seats for women. E , The narrow gallery round the summit of the interior, for the attendants who worked the velarium. pr , pr , The præcinct i ones, or landings, at the top of the first and second maenianum; in the pavement of which were grated apertures, at intervals, to admit light into the vomitoria beneath them. V V V V , Vomitoria. G G G , The three external galleries through the circumference of the building, open to the arcades of the exterior. g g , Inner gallery. The situation and arrangement of the staircases, ., are not expre ed, as they could not be rendered intelligible without plans at various levels of the building.