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
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
In Their Constitution
In both the constitution was aristocratic; the judges governed in Carthage, as did the senate in Rome, and both on the same system of police-control. The strict state of dependence in which the governing board at Carthage held the individual magistrate, and the injunction to the citizens absolutely to refrain from learning the Greek language and to converse with a Greek only through the medium of the public interpreter, originated in the same spirit as the system of government at Rome; but in comparison with the cruel harshness and the absolute precision, bordering on silliness, of this Carthaginian state- tutelage, the Roman system of fining and censure appears mild and reasonable.
The Roman senate, which opened its doors to eminent capacity and in the best sense represented the nation, was able also to trust it, and had no need to fear the magistrates. The Carthaginian senate, on the other hand, was based on a jealous control of administration by the government, and represented exclusively the leading families; its essence was mistrust of all above and below it, and therefore it could neither be confident that the people would follow whither it led, nor free from the dread of usurpations on the part of the magistrates.
Hence the steady course of Roman policy, which never receded a step in times of misfortune, and never threw away the favours of fortune by negligence or indifference; whereas the Carthaginians desisted from the struggle when a last effort might perhaps have saved all, and, weary or forgetful of their great national duties, allowed the half-completed building to fall to pieces, only to begin it in a few years anew. Hence the capable magistrate in Rome was ordinarily on a good understanding with his government; in Carthage he was frequently at decided feud with his masters at home, and was forced to resist them by unconstitutional means and to make common cause with the opposing party of reform.
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Reference address : https://www.ellopos.net/elpenor/rome/3-01-carthage.asp?pg=38