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.]



XIII

As the sequel to what has already been said, we must proceed to consider
what the poet should aim at, and what he should avoid, in constructing
his plots; and by what means the specific effect of Tragedy will be
produced.

A perfect tragedy should, as we have seen, be arranged not on the simple
but on the complex plan. It should, moreover, imitate actions which
excite pity and fear, this being the distinctive mark of tragic
imitation. It follows plainly, in the first place, that the change, of