Any city or town with a population of four hundred thousand or less may by ordinance provide for an inferior court to be known and designated as a municipal court, which shall be entitled "The Municipal Court of . . . . . . . . . (insert name of city or town)", hereinafter designated and referred to as "municipal court", which court shall have jurisdiction and shall exercise all powers by this chapter declared to be vested in the municipal court, together with such other powers and jurisdiction as are generally conferred upon such court in this state either by common law or by express statute.