a rule of procedure, not a limitation upon jurisdiction. Where a statute confers jurisdiction upon United States district courts over particular actions without regard to the amount in controversy or the citizenship of the parties, as in the present eases (15 U.S.C.A. § 77v(a); 15 U.S.C.A. § 78aa; Wilko v. Swan, 346 U.S. 427, 431, 74 S.Ct. 182, 98 L.Ed. 168, (1953); Deckert v. Independence Shares Corp., 311 U.S. 282, 289-290, 61 S.Ct. 229, 85 L.Ed. 189 (1940)), it is irrelevant to the district court’s jurisdiction whether compaints in such actions successfully plead class suits.
At most, failure, to comply with Buie 23 would render the complaints subject to dismissal without prejudice in so far as they sought relief on behalf of the class. And since “any deficiency in respect to pleading a class action is subject to correction by amendment” (Warner v. First Nat. Bank, 236 F.2d 853, 858 (8th Cir. 1956)”, plaintiffs might thereafter, by supplementing their pleading, satisfy the requirements of Rule 23. Or plaintiffs might proceed under Rule 20 solely on their own behalf. See
Cox v. Hutcheson, 204 F.Supp. 442, 447 (S.D. Ind.1962); Hess v. Anderson, Clayton & Co., 20 F.R.D. 466, 482, 484 (S.D.Cal. 1957). And even if there were no basis for permissive joinder, Rule 21 expressly provides that “misjoinder of parties is not ground for dismissal of an action.”
II
We do not mean to intimate that the present complaints might fail as. class actions.
Class actions under Rule 23(a) (3) have “proved useful where a large number of purchasers or holders of securities claim to have been defrauded by a common course of dealing on the part of the defendants,” (3 Moore’s Federal Practice ff 23.10 at 3448 (2d ed. 1963)), and have been frequently utilized in such situations. See particularly Amen v. Black, 234 F.2d 12, 16 (10 Cir. 1956); Zahn v. Transamerica Corp., 162 F.2d 36, 49-50 (3d Cir. 1947) ; Oppenheimer v. F. J. Young & Co., 144 F.2d 387, 390 (2d Cir. 1944); York v. Guaranty Trust Co., 143 F.2d 503, 528 (2d Cir. 1944), rev’d on other grounds, 326 U.S. 99, 65 S.Ct. 1464, 89 L.Ed. 2079 (1945); Independence Shares Corp. v. Deckert, 108 F.2d 51, 55 (3d Cir. 1939), aff’d as to this ground, rev’d on others, 311 U.S. 282, 287, 61 S.Ct. 229, 85 L.Ed. 189 (1940).5 Indeed, it has been suggested that “the ultimate effectiveness of the federal remedies” in this area “may depend in large measure on the applicability of the class action device,” and particularly of the “spurious” class action provided by Rule 23(a) (3). 3 Loss, Securities Regulation 1819-20 (2d ed. 1961).
We think the allegations of these complaints, on their face, satisfy the requirements of Rule 23(a) (3).6
The classes involved are self-evidently large. It seems unlikely that defendants can successfully controvert plaintiffs’ allegation that the expense and burden, to the parties and the court, of litigating each claim separately renders that course impractical, especially since “ ‘impracticability’ does not mean ‘impos
5
“If Gilbert v. Clark, D.Mass., 13 F.R.D. 498, 499, be construe! as reaching a different conclusion, it is contrary to the weight of authority *.” Cherner v. Transitron Electronic Corp., 201 F.Supp. 934, 935 (D.Mass.1962). The same may be said of Speed v. Transamerica Corp., 5 F.R.D. 56 (D.Del.1945), and Johnson v. Beneficial Loan Soc’y, 34 F.Supp. 392 (D.Del.1940). See generally Comment, 51 Calif.L.Rev. 939, 944-954 (1963).