placed as to make a complete circle impossible. At Athens, as we have seen, there was an interval of several feet between the front row of benches and the circuit of the orchestra. The interval was filled by a broad sloping step, which served as a passage to the auditorium. A similar passage is found at the Peiraeeus. But in most Greek theatres there was no passage of this kind, and the line of seats bordered immediately on the orchestra and the gutter by which it was encircled. The gutter was a regular feature in Greek orchestras, and was constructed in various styles. The Athenian type, with its broad and deep channel, and bridges at intervals, seems to have been exceptional and antique, and is not found elsewhere except at Sicyon and the Peiraeeus. In some places, such as Megalopolis, the gutter was much narrower, so as to need no bridges. At Epidaurus and Eretria, on the other hand, it was very broad and very shallow, and might be used as a passage to the auditorium in dry weather. The gutter at Epidaurus is no less than 7 feet across, and only 8 inches deep. The surface of the orchestra was in most cases, as at Athens, a few inches below the level of the front row of seats. It used often to be asserted that the surface was boarded over with planks. But this is an error, due to the fact that the Greek grammarians often used the word ‘orchestra’ to denote the stage.[362] The evidence of the theatres lately excavated shows that in almost every case the Greek orchestra consisted simply of earth beaten down hard and flat. It is true that the orchestra at Eretria was paved with slabs of limestone, and that at Delos, which lay on the rock, was covered with a ‘coating’ of some kind or another.[363] But in all other instances, as far as we know, the surface was merely of earth. Marble pavements are never found in Greek theatres, except when they had been built or reconstructed in the Roman fashion. Lines were sometimes marked on the floor of the orchestra, to assist the chorus in their evolutions.[364] Similar lines are used on the modern stage when complicated ballets are produced. Aristotle mentions cases of orchestras being strewed with chaff, and remarks that when this was done the choruses were not heard so well. But it is uncertain to what theatres or to what occasions he is referring.[365]