However, the case law long has established that where, as here, a request for appellate fees and costs fails to identify the legal grounds on which the award allegedly would be justified, that request does not rise to the level of adequate appellate argument contemplated by Mass. R. A. P. 16 (a) (4), as amended, 367 Mass. 921 (1975), and therefore need not be entertained. Gustin v. Gustin, 420 Mass. 854, 858, 652 N.E.2d 610 (1995). Nor are valid grounds for an award of appellate fees otherwise apparent on the record before us.