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
Of poetry attaching itself to the Alexandrian school nothing
occurs in Rome at this epoch except minor poems translated from or
modelled on Alexandrian epigrams, which deserve notice not on their
own account, but as the first harbingers of the later epoch of
Roman literature. Leaving out of account some poets little known
and whose dates cannot be fixed with certainty, there belong to
this category Quintus Catulus, consul in 652(25) and Lucius
Manlius, an esteemed senator, who wrote in 657.
The latter seems
to have been the first to circulate among the Romans various
geographical tales current among the Greeks, such as the Delian
legend of Latona, the fables of Europa and of the marvellous bird
Phoenix; as it was likewise reserved for him on his travels to
discover at Dodona and to copy that remarkable tripod, on which
might be read the oracle imparted to the Pelasgians before their
migration into the land of the Siceli and Aborigines--a discovery
which the Roman annals did not neglect devoutly to register.