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
The body of citizens in Carthage, though not expressly restricted, as in Sparta, to the attitude of passive bystanders in the business of the state, appears to have had but a very slight amount of practical influence on it In the elections to the gerusia a system of open corruption was the rule; in the nomination of a general the people were consulted, but only after the nomination had really been made by proposal on the part of the gerusia; and other questions only went to the people when the gerusia thought fit or could not otherwise agree.
Assemblies of the people with judicial functions were unknown in Carthage. The powerlessness of the citizens probably in the main resulted from their political organization; the Carthaginian mess- associations, which are mentioned in this connection and compared with the Spartan Pheiditia, were probably guilds under oligarchical management. Mention is made even of a distinction between "burgesses of the city" and "manual labourers," which leads us to infer that the latter held a very inferior position, perhaps beyond the pale of law.
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Reference address : https://www.ellopos.net/elpenor/rome/3-01-carthage.asp?pg=30