Note 1788 — BOOK XV.
Lewis Evans translation
Postomis (ab ἐπιστομίς), or, as some read, prostomis, is a sort of muzzle or "twitch" put upon the nose of a refractory horse. To this Lucilius compares the drinking-cup applied for so long a time to the lips of the toper, that it looks as though it were suspended from his nose. Cf. Turneb., Adversar., 17, c. ult. Trulla. Cf. Juv., iii., 107.