1. From the foregoing statement it is mani-, fest that the court, as well as the defendant, treated the so-called “equitable defense” as new matter, not constituting a counterclaim; and it is equally plain that the court rendered judgment upon the ground that the allegation of such new matter must, in the absence of a reply, be taken as true. Such being the theory upon which the motion for judgment was made and sustained, we deem it proper for-the present purpose to adopt the view of the court below to the extent of conceding that the affirmative averments of the answer set up new matter constituting a defense. In other words, we do not determine whether the answer contains the statement of *510any new matter constituting a defense, but shall treat it, as did the district court, as pleading some material matters in defense, which may not be proved under the denial.
The question first presented is, therefore, must the material allegations of new matter in defense be taken as true unless controverted by a reply ? Explicit answer is made by the Code of Civil Procedure. Section 690 prescribes, among other things, that the answer must contain a statement of any new matter constituting a defense or counterclaim. Section 720 is as follows: “Where the answer contains a counterclaim, the plaintiff, if he does not demur, may, within twenty days after service of the answer, reply to the counterclaim. The reply must contain a general or specific denial of each of the material allegations of the counterclaim, controverted by the plaintiff, or of any knowledge or information thereof sufficient to form a belief, or a specific admission or denial of some of the allegations of the counterclaim,- and also a general denial of all the allegations of the counterclaim not specifically admitted or denied in the reply; and it may set forth in ordinary and concise language, without repetition, new matter not inconsistent with the complaint, constituting a defense to the counterclaim. ’ ’
Section 722 provides that, if the plaintiff fail to reply or demur to the counterclaim, the defendant shall be entitled to the same relief as a plaintiff upon failure of defendant to demur to or answer the complaint. Section 754 reads as follows: “Each material allegation of the complaint, not controverted by the answer, and each material allegation of new matter in the answer, not controverted by the reply, where a reply is required, must, for the purposes of the action, be taken as true. But an allegation of new matter in the answer, to which a reply is not required, or of new matter in a reply, is to be deemed controverted by the adverse party. ’ ’
The sections referred to are quite similar to the provisions of the Code of Civil Procedure of New York upon the same subject. Sections 514 and 522 of the code last named are, so far as pertinent to this question, the same as Sections 720 and *511754 of the code of Montana. It is held under these sections of the New York code that a reply is not necessary to form an issue upon new matter pleaded in defense. (Arthur v. Homestead Fire Insurance Co., 78 N. Y. 462; Springer v. Bien (Com. Pl.) 10 N. Y. Supp. 530; Burke v. Thorne, 44 Barb. 363; Dambman v. Shulting, 4 Hun. 50; Argall v. Jacobs, 87 N. Y. 110; Argotsinger v. Vines, 82 N. Y. 308.) It may be urged, however, that Sections 721 and 723 of the Code of Civil Procedure of Montana indicate that the legislature intended that an affirmative defense, unless replied to, must be taken as true.
These sections are as follows: Section 721. “A reply may contain two or more distinct avoidances of the same defense or counterclaim, but they must be separately stated and numbered.” Section 723. “The defendant may also demur to the reply, or to a separate traverse to, or avoidance of, a defense or counterclaim, contained in the reply, on the ground that it is insufficient in law upon the face thereof. ’ ’
But we are satisfied that Section 720, supra, prescribes the only conditions permitting a reply, and that Sections 722 and 754, supra, declare the effect of a failure to reply, which pleading is not required unless plaintiff desires to interpose a defense to a counterclaim. Our code omits Section 516 of the Code of Civil Procedure of New York, to the effect that the court may, in its discretion and on defendant’s application, direct plaintiff to reply to new matter constituting a defense by way of avoidance, and that in such case the reply and proceedings upon failure to reply are subject to the rules applicable to the case of a counterclaim. Section 517 of the New York code is identical with Section 721, supra, of the Montana code, and was, as to the declaration concerning the contents of a reply to a defense, enacted for the obvious purpose of supplementing Sec;ion 516; and it is only by virtue of the provisions of Section 516 that a reply to new matter in avoidance may be filed. (Dillon v. Railway Co., 46 N. Y. Super. Ct. Rep. 21.) Since in Montana, a reply is not necessary to put in issue the truth oí allegations of new matter *512constituting a defense, and since, in Montana, the court may not require such reply the provisions of Sections 721 and 723, supra, referring to a reply in avoidance of a defense, and to' a demurrer by defendant to such avoidance, fail to serve the end attained in New York by similar provisions, which are in pari materia with, and exist because of, a statute of that state authorizing the court to direct the filing of a reply to a defense by way of avoidance.
Under the present code of this state, the allegations of new matter in defense are deemed controverted by the plaintiff. The court erred, therefore, in. sustaining the motion upon the grounds therein stated.
2. The defendant contends in this court that the affirmative matter set up in the answer constituted a counterclaim, and that the district court, in the absence of a reply, rightly gave judgment on the pleadings. Plaintiff, on the contrary, insists that a counterclaim was not pleaded. The contention over this question has been earnest, and, on the part of the defendant, somewhat extended.
The answer does not state facts sufficient to. constitute a. counterclaim, as defined in Section 691 of the Code of Civil Procedure. Unless the matter alleged, taken by itself, and without reference to the complaint, would, if proved, entitle defendant to judgment against the plaintiff, a counterclaim is-not pleaded; that is to say, a counterclaim is a cause of action existing in favor of defendant, and against the .plaintiff, and must therefore contain a statement of such facts as would be requisite to the sufficiency of a complaint, and must, in stating a cause of action, be complete within itself. “It must be-a cause of action; in other words, the facts must be such that they would constitute the entire matter proper and necessary to be set forth in the complaint oi petition, if the defendant had chosen to institute an independent action between himself as plaintiff and the plaintiff as defendant. When a counterclaim is pleaded, the defendant becomes, as far as respects the matters alleged therein, an actor. There are substantially two ■ simultaneous actions pending between the same *513parties, each of whom is at the same time a plaintiff and a defendant. Since’the counterclaim states a cause of action, it is to be governed and judged by the rules which apply to the complaint. The facts alleged must be sufficient to constitute a cause of action.” (Pomeroy’s Code Remedies, Section 738; Wabash etc. Union v. James (Ind. App.) 35 N. E. 919.)
It is apparent that the answer does not state facts sufficient to constitute a cause of action against the plaintiff. Tne plaintiff sued for the conversion of personal property alleged to belong to him. The answer, after a general denial, states that certain lumber was once owned by Wilkinson, who assigned the same wich his other assets to McClellan, for the benefit of his creditors; that upon the discharge of McClellan, the defendant was appointed assignee by the judge of the district court, and received and disposed of said property as assignee; that plaintiff did not obtain an order to bring the action; and that plaintiff knowingly stood by and allowed defendant to sell the property, and made no demand therefor before bringing the suit; and that the acts of the defendant so pleaded are the only acts-of which the plaintiff complains. Here is nothing which, if proved, would entitle defendant to affirmative relief, unless-the dismissal of the complaint and the awarding of costs to-him be so considered. Were the defendant receiver of the estate' of the insolvent, the omission to obtain leave of court-to sue would, even if leave were necessary, be mere matter of defense in bar of the present action; and so with the supposed plea of estoppel. It is, moreover, apparent that the defendant is not the receiver, but is the assignee appointed in the place of the original assignee, and clothed with such powers only as were possessed by his predecessor. Examination of Sections 4510 to 4535 of the Civil Code, which merely regulate common law assignments for the benefit of creditors, and of Sections 950 to 956 of the Code of Civil Procedure, relating to receivers, demonstrates the fact that neither an original assignee nor his successor, as such, is a receiver. These observations as to the character of defendant’s trust may not *514be pertinent to any question involved in the determination of this appeal. His insistence that he is a receiver has, however, induced us to dispose of the point by a reference to the statutory provisions whereby his contention is confuted.
There is a further and controlling reason why the alleged new matter set up in the answer should not be treated as a counterclaim. It is denominated an ‘ ‘equitable defense, ’ ’ and does not purport to be a counterclaim. Defendant having characterized his pleading as a defense, is bound by the choice he makes, and may not afterwards be heard to assert that it is a counterclaim. (22 Am. & Eng. Ency. Law, 423, and cases there cited.) A counterclaim must be described as such where the-question turns upon the want of a reply. “Such a rule is essential to protect a plaintiff from being misled by an ansiver, and to prevent the snare of a counterclaim lurking under the cover of a supposed defense, and unconsciously admitted by a failure to reply.” (Baker v. Hotchkiss, 97 N. Y. at page 408. See, also, Pomeroy’s Code Remedies, Sec. 748, note 1; Boone, Code Pleadings, Sec. 101, and cases there cited in notes.) This rule, which is supported by the decided weight of authority, is both simple and just. The defendant insists, however, that the decision in Davis v. Davis, 9 Mont. 267, 23 Pac. 715, is conclusive of the case at bar. In that case the only question necessary to be decided was whether an answer stated facts sufficient to constitute either a defense or a counterclaim; but, even if that decision is correct, it cannot control the determination of the question now presented, for the reason that in the Davis case no advantage was sought because of failure to reply, and for the more weighty reason that, under the statutes then in force, all averments of new matter in the answer, whether by way of defense or as constituting a counterclaim, not traversed or avoided by reply, were admitted to be true. Then the plaintiff knew that, by failing, to reply, he admitted the truth of all the new matter alleged in the answer. Now he knows that the statement of new matter in defense is deemed controverted or avoided, and that it is necessary to reply only when a counterclaim is set up. ‘ ‘In *515all the states but one or' two, the plaintiff must reply to a counterclaim, or its averments of fact are admitted to be true. He ought not to be subject to this penalty unless he is told in the most express terms that the pleading is a counterclaim. ’ ’ (Pomeroy’s Code Remedies, Sec. 748.) In California, where no reply whatever is allowed, the allegations of new matter of defense and of counterclaim are deemed denied or confessed and avoided; and even there it is said that, “where matters which are proper matters of defense are pleaded as such, we are clear that they should be regarded only as such, notwithstanding a prayer for affirmative relief at the conclusion of the answer. The matters of the cause of complaint must be separately stated as a cause of action against the plaintiff, and not asa defense to the plaintiff’s cause of action.” (Doyle v. Franklin, 40 Cal. 110; Brannan v. Paty, 58 Cal. 330; Carpenter v. Hewel, 67 Cal. 589, 8 Pac. 314.)
The motion for judgment on the pleadings should have been denied. The judgment is therefore reversed, and the cause remanded.
Reversed and remanded.
Hunt, J., concurs.