Although an action by or against representatives of the membership of an unincorporated association has often been viewed as a class action, the real or main purpose of this characterization has been to give “entity treatment” to the association when for formal reasons it cannot sue or be sued as a jural person under Rule 17 (b). See Louisell & Hazard, Pleading and Procedure: State and Federal 718 (1962); 3 Moore’s Federal Practice, par. 23.08 (2d ed. 1963); Story, J. in West v. Randall, 29 Fed.Cas. 718, 722–23, No. 17,424 (C.C.D.R.I. 1820); and, for examples, Gibbs v. Buck, 307 U.S. 66 (1939); Tunstall v. Brotherhood of Locomotive F. & E., 148 F.2d 403 (4th Cir. 1945); Oskoian v. Canuel, 269 F.2d 311 (1st Cir. 1959). Rule 23.2 deals separately with these actions, referring where appropriate to Rule 23.