[The parts of Tragedy which must be treated as elements of the whole
have been already mentioned. We now come to the quantitative parts,
and the separate parts into which Tragedy is divided, namely, Prologue,
Episode, Exode, Choric song; this last being divided into Parode and
Stasimon. These are common to all plays: peculiar to some are the songs
of actors from the stage and the Commoi.
The Prologue is that entire part of a tragedy which precedes the Parode
of the Chorus. The Episode is that entire part of a tragedy which
is between complete choric songs. The Exode is that entire part of a
tragedy which has no choric song after it. Of the Choric part the Parode
is the first undivided utterance of the Chorus: the Stasimon is a Choric
ode without anapaests or trochaic tetrameters: the Commos is a joint
lamentation of Chorus and actors. The parts of Tragedy which must
be treated as elements of the whole have been already mentioned. The
quantitative parts the separate parts into which it is divided--are here
enumerated.]