Section, act June 25, 1948, ch. 646, 62 Stat. 942, directed that the Court of Claims have jurisdiction to review by appeal final judgments in the district courts in civil actions based on tort claims brought under section 1346 (b) of this title if the notice of appeal filed in the district court had affixed to it a written consent on behalf of the appellees that the appeal be taken to the Court of Claims.