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 were not annual officials, but, in obedience to the occasional character of the Roman fleet, came into existence when a war required its creation. The office seems to have become extinct by the second century

More occasional still was the creation by the comitia tributa, in later times occasionally by the concilium plebis, of minor magistrates with extraordinary functions. Such were the officials for conducting a colony (coloniae deducendae) for the assignment of land (agris dandis assignandis), or for the dedication of a temple (aedi dedicandae). To this category belong the occasional curatores for the corn-supply and the roads (annonae, viarum).