In 1986, in a comprehensive act, the Legislature made substantial changes in the law concerning child support in the Commonwealth. St. 1986, c. 310. That act, among other things, inserted an entirely new chapter in the General Laws concerning the rights of children born out of wedlock. G. L. c. 209C (1986 ed.), inserted by St. 1986, c. 310, § 16.
In this proceeding, brought to establish the defendant’s obligation to support an illegitimate child (the minor plaintiff), the defendant challenges the constitutionality of two provisions of the 1986 act. He contended in the trial court that this proceeding is barred because in 1984, on a paternity complaint under G. L. c. 273, a jury determined that he was not the father of the minor plaintiff. He argued successfully that the provision in G. L. c. 209C, § 22 (d), stating that such an earlier adjudication is not a bar to a G. L. c. 209C proceeding, cannot lawfully be applied to him. Second, if this proceeding may properly go forward, the defendant, who has filed a claim of a jury trial, argues that, under the Constitution of the Commonwealth he is entitled to a trial by jury and that the provision in G. L. c. 209C, § 12, stating that trials in actions under G. L. c. 209C “shall be by the court without a jury,” is unconstitutional.
A judge of the District Court Department allowed the defendant’s motion for summary judgment and dismissed the action. *179Although he filed no explanation of his action, it is reasonably clear that the judge concluded that this proceeding was foreclosed by the earlier paternity determination in the defendant’s favor. We transferred the plaintiffs’ appeals to this court from the Appeals Court. After deciding that (1) the plaintiffs’ appeals were properly entered in the Appeals Court, we conclude that (2) the minor plaintiff is not barred from maintaining this action, but that the Department of Revenue (department) is barred and that (3) the defendant has not demonstrated that he is entitled to a jury trial in this proceeding.
The summary judgment motion was heard on a “stipulation of fact” presented on “the issue of the effect of a previous verdict of not guilty on a criminal complaint for paternity” under G. L. c. 273, § 12 (as appearing in St. 1981, c. 325, and repealed by St. 1986, c. 310, § 25). The minor plaintiff was bom February 10, 1982. His mother and the defendant have never been married to one another. She claims that the defendant is the father of the child.
On December 30, 1983, the defendant was. arraigned on a criminal complaint charging him with paternity of the minor plaintiff. The complaint was issued at the request of a representative of the Department of Public Welfare, subrogee to the mother’s rights. Blood samples were taken for human leukocyte antigen (HLA) tests and for blood grouping tests. The test results showed that the defendant was not excluded as the father and that there was “a 99.47% probability that Wayne I. Jarvenpaa is the father of [the minor plaintiff].” After a pretrial hearing on the Commonwealth’s motion seeking a determination that the test results would be admitted at the defendant’s trial, a District Court judge ruled that because of G. L. c. 273, § 12A, the evidence was not admissible.2 The motion judge denied the Commonwealth’s motion for a report of the question of the admissibility of inculpatory HLA test results, *180and the Commonwealth did not attempt to appeal from the ruling excluding the evidence.
On May 15, 1984, the defendant was tried on the criminal complaint before a six-person jury. He, the mother, and other witnesses testified. The jury returned a verdict of not guilty and specifically found that the defendant was not the father of the minor plaintiff.
On October 9, 1986, a representative of the Department of Public Welfare, on behalf of the mother, filed the civil complaint that commenced this proceeding. The complaint seeks a determination that the defendant is the minor’s father, an order for suitable future support and health insurance for the child, and restitution of confinement expenses and of expenses since the child’s birth. On November 4, 1987, the District Court judge allowed the defendant’s motion for summary judgment dismissing the action.
1. We discuss first the question whether the plaintiffs ’ appeal is properly here. No party claims that it is not. The department’s brief notes the problem, and, because it is a jurisdictional question, we should deal with it first.
If the appeal was properly entered in the Appeals Court, we may properly consider it after transferring it here on our own motion. The question is whether the correct avenue for the department’s appeal, later joined in by the minor plaintiff, was to the Appeals Court.3 The problem arises from the fact that G. L. c. 209C provides no express direction concerning the avenue of appeal that may be pursued following entry of judgment. Chapter 209C cases may be entered in the Probate and Family Court, and any judgment entered in that court is appealable to the Appeals Court under G. L. c. 211A, § 10 (1986 ed.). This case, however, was decided in a District Court, and, as to rulings of law, it might be suggested that the normal *181course of appeal in a civil matter tried before a judge without a jury is to the Appellate Division. G. L. c. 231, § 108 (1986 ed.).4
The Appellate Division has considered the question of where a G. L. c. 209C appeal lies and has concluded that it lacks jurisdiction of such an appeal because G. L. c. 209C actions are equitable in nature. See Brown v. McCow, Mass. App. Div. N. Dist. No. 8942, slip op. at 3 & n.2 (May 19, 1988); Aiello v. Spinale, Mass. App. Div. N. Dist. No. 8958 (May 19, 1988). In deciding as it did, the Appellate Division relied on our opinion in Walker v. Board of Appeals of Harwich, 388 Mass. 42 (1983), which held that appeals in zoning cases tried in the District Courts should be presented to the Appeals Court and not to the Appellate Division. Although the statute in the Walker case (“the parties shall have all rights of appeal and exception as in other equity cases,” G. L. c. 40A, § 17 [1986 ed.]), is somewhat clearer on the matter of legislative intent concerning appeals than is G. L. c. 209C, the principle that appeals in cases involving equitable considerations should go to the Appeals Court, in the absence of some other statutory direction, fairly applies here. Id. at 49-50. The remedies available in G. L. c. 209C proceedings are equitable in nature. See G. L. c. 209C, §§ 1, 9, 15, 19, and 20.
Practical considerations also support our conclusion that all appeals in G. L. c. 209C cases should go to the same court. Uniformity of treatment of litigants and the development of a consistent body of law will be encouraged by placing all G. L. c. 209C appeals in one court. In the absence of any express legislative direction, we conclude that the principles expressed in our Walker opinion and the practical desirability of having all G. L. c. 209C appeals heard in one court call for a determination that G. L. c. 209C appeals go to the Appeals Court.
2. We come then to consider the question whether the present action is barred because the jury in the earlier paternity proceeding under a statute since repealed (G. L. c. 273, § 12), found the defendant not guilty on a complaint charging him with being the father of the minor plaintiff.
*182The Legislature intended that an action such as this could be maintained in spite of a verdict in an earlier proceeding under G. L. c. 273, § 12, in favor of an alleged father. “No proceeding hereunder shall be barred by a prior finding or adjudication under any repealed sections of [G. L. c. 273] or by the fact that a child was bom prior to the effective date of this chapter.” G. L. c. 209C, § 22 (d). The defendant argues that the language in § 22 (d) concerning prior adjudications was designed only to preserve prior determinations that a man was the father of a child and has no bearing on a prior not guilty determination. The argument lacks a logical basis and is contrary to the apparent meaning of the words used in § 22 (d).
We conclude that the Legislature intended to permit readjudication of the question of paternity under G. L. c. 209C where, under G. L. c. 273, § 12, proof of the alleged paternity of the defendant had not succeeded. Section 22 (d) makes irrelevant all questions concerning the application to this kind of case of common law principles of claim and issue preclusion based on findings and mlings in earlier litigation. Claim and issue preclusion are not founded on constitutional principles, but are matters of public policy. See Commissioner v. Sunnen, 333 U.S. 591, 597 (1948); Hooper v. United States, 326 F.2d 982, 985 (Ct. Cl.), cert denied, 377 U.S. 977 (1964); 18 C.A. Wright & A.R. Miller, Federal Practice and Procedure § 4403, at 11 (1981 & Supp. 1988). The Legislature has mandated that there shall be no claim or issue preclusion arising from any adjudication under G. L. c. 273, § 12. See Restatement (Second) of Judgments § 20 (1) (c) (1982); Premier Elec. Constr. Co. v. National Elec. Contractors Ass’n, 814 F.2d 358, 363-364 (7th Cir. 1987). The remaining question, then, is whether there is any constitutional prohibition against carrying out the Legislature’s intent.
The defendant argues that, as we have construed it, § 22 (if) violates art. 30 of the Massachusetts Declaration of Rights, concerning the separation of powers.5 We agree that separation *183of powers principles of art. 30 bar the Commonwealth and its agencies from relitigating an issue that was contested between the Commonwealth and the defendant and resolved by a judgment in the defendant’s favor. Article 30 prohibits any legislative attempt “to grant a new trial or a rehearing in a cause in the courts, or to declare ineffective orto reverse, annul, change, modify or affect the judgment of a court.” Opinion of the Justices, 234 Mass. 612, 621 (1920). We recently ruled that a statute that purported to restore a dismissed case to the Superior Court docket was an unlawful attempt to exercise an exclusively judicial power. Spinelli v. Commonwealth, 393 Mass. 240 (1984). See Weingartner v. North Wales, 327 Mass. 731, 737 (1951). For art. 30 purposes, it does not matter that in the earlier proceeding the Commonwealth was burdened with an obligation to prove its case beyond a reasonable doubt6 and had no right to appeal the exclusion of relevant medical tests bearing on the paternity issue.7 The Commonwealth *184elected to contest the paternity issue on an uneven playing field and cannot now be heard to complain. The Legislature may not constitutionally enact a law that, in effect, vacates final judgments entered under G. L. c. 273 in paternity actions and authorizes the Commonwealth, if it wishes, to relitigate each paternity issue.
We take a different view of the right of the minor plaintiff to proceed in this case. He is not bound by the determination made in the defendant’s favor in the Commonwealth’s G. L. c. 273 proceeding. Courts elsewhere have generally considered a child bom out of wedlock not to be in privity with the State, and thus such a child has not been bound by an earlier determination that a particular man was not his father, made in a proceeding brought by the State seeking to establish support obligations and thereby to reduce its public assistance obligatians. See Settle by and through Sullivan v. Beasley, 309 N.C. 616, 620-621 (1983) (child’s interest in paternity determination is not solely economic); Burley v. Johnson, 33 Wash. App. 629, 640 (1983) (State, parent, and child “each have separate and independent interests in establishing paternity”); State ex rel. Adult & Family Servs. Div. v. Tuttle, 304 Or. 270, 274 (1987) (Linde, J., concurring). See also Spada v. Pauley, 149 Mich. App. 196, 199 n.1, 205 n.6 (1986) (mother’s paternity action does not bar child’s); Arsenault v. Carrier, 390 A.2d 1048, 1051 (Me. 1978) (same). But see T.R. v. A.W. by Pearson, 470 N.E.2d 95, 96-97 (Ind. Ct. App. 1984) (two to one decision) (issue preclusion bars retrial because mother fully represented child’s interests; dicta suggest same result if original plaintiff were the State).
The minor plaintiff should not be foreclosed by the prior judgment from presenting his own case for support [and perhaps to establish other rights) against the defendant.8 The prior pro*185ceeding was not brought in the minor’s name, nor could it have been. He should not be held to have lost his rights because of the results of a proceeding in which the Commonwealth, acting for its own financial benefit, elected to contest the paternity issue in disadvantageous circumstances. Legitimate children’s support rights are not contested in such unfavorable circumstances, and it would be unfair, and possibly unconstitutional on equal protection grounds (see Reed v. Campbell, 476 U.S. 852, 856 [1986]; Mills v. Habluetzel, 456 U.S. 91, 97-99 [1982]), to discriminate against an illegitimate child and cause his support rights to be irretrievably surrendered in such a proceeding. In any event, we see no legislative intrusion into judicial prerogatives in granting to an illegitimate minor the right to maintain an action seeking to establish his father’s identity and obligation to support him even though, by prior judicial decision, executive agencies of the Commonwealth had lost the right to impose on the putative father obligations of support in their favor.
We conclude that this action may properly be maintained on behalf of the minor plaintiff, but that it must be dismissed as to the department.
3. Because we conclude that the minor plaintiff may maintain this action, we reach the question whether the defendant may properly be denied a jury trial. The defendant argues that he is entitled to a jury trial even though G. L. c. 209C, § 12, provides otherwise (“[i]n actions under this chapter, the trial shall be by the court without a jury”). He claims that his jury trial right is mandated by art. 15 of the Massachusetts Declaration of Rights and that it cannot be denied by statute. Article 15, quoted in full in the margin,9 preserves “the common law *186trial by jury in its indispensable characteristics as established and known at the time the Constitution was adopted” in 1780. Opinion of the Justices, 237 Mass. 591, 596 (1921). The common law to which the Justices were referring in their 1921 opinion was not only the common law (judge-made law) of England but also, in general, the English statutes in force at the time of emigration, certain other English statutes and “ancient usages.” Commonwealth v. Knowlton, 2 Mass. 530, 534-535 (1807). In the Knowlton opinion, this court added the following comment: “So much, therefore, of the common law of England, as our ancestors brought with them, and of the statutes then in force, amending or altering it, — such of the more recent statutes as have been since adopted in practice, — and the ancient usages aforesaid, — may be considered as forming the body of the common law of Massachusetts ...” (emphasis in original). Id. at 535.
Among the laws of England brought to this colony was at least that portion of 18 Eliz., c. 3, the Poor Law Act of 1576, that stated that an order to contribute to the support of a bastard could be made by two justices of the peace against the mother or the reputed father. 1 W. Blackstone, Commentaries 458 (1765). It is thus unimportant, for our present purposes, that under the common law of England a father had no legally enforceable duty to support his illegitimate child. See Commonwealth v. Lobo, 385 Mass. 436, 444 (1982). The obligation of support existed by English statute before 1620, and it was further expressed by laws enacted in Massachusetts. See the statute appearing in the 1672 edition of the General Laws of Massachusetts Colony, at 55, reprinted in Colonial Laws of Massachusetts 1672-1686 (1887);10 the 1692 statute (Province Laws c. 18, § 5 [1692-1693]).11
*187There are certain clearly identifiable classes of cases for which a jury trial was not provided prior to 1780. See Parker v. Simpson, 180 Mass. 334, 344-355 (1902) (Justice Hammond’s scholarly, historical discussion of the jury trial provision in art. 15, holding that there was no right to jury trial in matters falling within the jurisdiction of courts of chancery);12 Bucknam v. Bucknam, 176 Mass. 229, 230-231 (1900) (before 1780, matters of marriage, divorce, alimony, and support of legitimate children were heard by the Governor and Council without a trial by jury); Shirley v. Lunenburg, 11 Mass. 379, 385 (1814) (claim for support of illegitimate child and mother who removed from town of legal settlement to another town; “all questions relative to the settlement or removal of paupers were heard and determined by the Courts of General Sessions of the Peace, without the intervention of a jury”). Because bastardy actions were generally considered civil actions for the purpose of freeing a municipality from the necessity of supporting the child (see Commonwealth v. Lobo, 385 Mass. 436, 444 [1982]), the Shirley case, which also involved a question of support for an illegitimate child and was properly tried without a jury, suggests that actions concerning the support of illegitimate children also may have been tried by the justices of the peace without a jury.13
*188The plaintiffs argue that the defendant is not entitled to a jury trial because proceedings under G. L. c. 209C involve newly created rights. If a wholly new cause of action is created, a jury trial right does not attach to that claim. See Commonwealth v. Guilfoyle, 402 Mass. 130, 135-136 (1988) (civil rights); Commonwealth v. Mongardi, 26 Mass. App. Ct. 5, 8 (1988) (civil motor vehicle infractions). A claim under G. L. c. 209C against a putative father for the support of an illegitimate child is not, however, a new type of claim that, therefore, carries no jury trial right with it. Cases involving paternity and the duty to support illegitimate children have existed for centuries. Consequently, we cannot sustain the denial of the right to a jury trial to the defendant on the ground that the G. L. c. 209C claim in this case is a new cause of action.14
The plaintiffs further argue that G. L. c. 209C paternity and attendant support claims pertain “to equity jurisprudence as generally understood in England and Massachusetts at the time of the adoption of the Constitution,” Commissioner of Banks v. Harrigan, 291 Mass. 353 (1935), and, therefore, no jury right exists. The Legislature may not, however, take away a right to a jury trial simply by a change in procedure that makes an action an equitable one.
The plaintiffs ’ argument that a paternity claim was not within the class of cases tried to a jury prior to 1780, either because nonsupport claims were not tried to juries or because such proceedings had an equitable aspect (or both), carries some force. In the absence of any demonstration that bastardy actions *189were in fact tried to a jury prior to 1780, we conclude that this defendant has not shown that he is entitled to a trial by jury. Our conclusion is supported by the facts that (1) before 1780, matters concerned with the support of legitimate children and with the obligation of towns to support paupers were not tried to juries and (2) the relevant pre-1780 statutory provisions suggest that juries were not to be involved in such cases. Investigation of original records shows that paternity actions were not tried to a jury as a usual practice immediately before 1780.15
4. The summary judgment dismissing the action as to the Department of Revenue is affirmed. The summary judgment dismissing the action as to the minor plaintiff is vacated, and the case is remanded to the District Court for further proceedings.
So ordered.