Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
The fundamental elements of the national music and choral dancing
in Latium, which must likewise have been established during this
period, are buried for us in oblivion; except that the Latin pipe
is reported to have been a short and slender instrument, provided
with only four holes, and originally, as the name shows, made out
of the light thighbone of some animal.
Masks
Lastly, the masks used in after times for the standing characters
of the Latin popular comedy or the Atellana, as it was called:
Maccus the harlequin, Bucco the glutton, Pappus the good papa, and
the wise Dossennus--masks which have been cleverly and strikingly
compared to the two servants, the -pantalon- and the -dottore-, in
the Italian comedy of Pulcinello--already belonged to the earliest
Latin popular art.