sentences:  However four guns were substituted for the 203 mm guns before construction began and six more 37 mm guns were added in lieu of the 75 mm guns during construction although the baseplates for the 75 mm guns were retained for future use.The four 138 mm 40-caliber guns were on M1924 mounts with gun shields.Two guns each were fore and aft in superfiring positions on the centerline.