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 first of these
three engagements was soon at an end; the ships of the Carthaginian
centre, manifestly much weaker than the two Roman squadrons with which
they were engaged, took to flight. Meanwhile the two other divisions
of the Romans had a hard struggle with the superior enemy; but in
close fighting the dreaded boarding-bridges stood them in good stead,
and by this means they succeeded in holding out till the two admirals
with their vessels could come up.
By their arrival the Roman reserve
was relieved, and the Carthaginian vessels of the right wing retired
before the superior force. And now, when this conflict had been
decided in favour of the Romans, all the Roman vessels that still
could keep the sea fell on the rear of the Carthaginian left wing,
which was obstinately following up its advantage, so that it was
surrounded and almost all the vessels composing it were taken. The
losses otherwise were nearly equal. Of the Roman fleet 24 sail were
sunk; of the Carthaginian 30 were sunk, and 64 were taken.