A motion to serve a supplemental pleading alleging any new and additional cause of action is addressed to the discretion of the court (Civ. Prac. Act, § 245-a). There is no specification by the Appellate Division that its decision was based solely on a question of law as provided by section 603 of the Civil Practice Act. Consequently, we must presume that its decision was based on an exercise of discretion. Thus, there is no decisive question of law for us to review (Mencher v. Chesley, 297 N. Y. 94, 102-103; Long Park v. Trenton-New Brunswick Theatres Co., 299 N. Y. 718, 719-720; Stevenson v. News Syndicate Co., 302 N. Y. 81, 87; see Meenan v. Meenan, 1 N Y 2d 269, decided herewith).
Conway, Ch. J., Desmond, Dye, Fuld, Froessel, Van Voorhis and Burke, JJ., concur.
Appeal dismissed, etc.