Porphyry tells us that Plotinus did not bestow any titles upon his own discourses. The titles were bestowed by his disciples; who did not always agree, but gave different titles to the same discourse (Porphyry, Vit. Plotin. 4).

The following table exhibits this philosophical classification of Thrasyllus:—

Table I.

PHILOSOPHICAL DISTRIBUTION OF THE WORKS OF PLATO BY THRASYLLUS.
I. Dialogues of Investigation. II. Dialogues of Exposition.
Searching Dialogues. Guiding Dialogues
Ζητητικοί. Ὑφηγητικοί.
I. Dialogues of investigation.
Gymnastic. Agonistic.
Μαιευτικοί. Πειραστικοί. Ἐνδεικτικοί. Ἀνατρεπτικποί.
Obstetric. Peirastic. Probative. Refutative.
Alkibiadês I. Charmidês. Protagoras. Euthydêmus.
Alkibiadês II. Menon. Gorgias.
Theagês. Ion. Hippias I.
Lachês. Euthyphron. Hippias II.
Lysis.
II. Dialogues of Exposition.
Theoretical. Practical.
Φυσικοί. Λογικοί. Ἠθικοί. Πολιτικοί.
Physical. Logical. Ethical. Political.
Timæus. Kratylus. Apology. Republic.
Sophistês. Kriton. Kritias.
Politikus. Phædon. Minos.
Parmenidês. Phædrus. Leges.
Theætêtus. Symposion. Epinomis.
Menexenus.
Kleitophon.
Epistolæ.
Philêbus.
Hipparchus.
Rivales.

I now subjoin a second Table, containing the Dramatic Distribution of the Platonic Dialogues, with the Philosophical Distribution combined or attached to it.

Table II.