OPINION OF THE COURT
ALDISERT, Circuit Judge.We are asked to review the district court’s denial of a motion made under 28 U.S.C. § 2255 by appellant McKnight to vacate the sentence imposed upon his conviction for federal narcotics law violations. Because the notice of appeal was not sea*231sonably filed in the district court, however, we must dismiss the appeal.1
I.
The appellant was charged in a March 1975 indictment with fourteen violations of federal narcotics law, 21 U.S.C. § 841. Although the case was originally listed for trial in November 1975, appellant failed to appear and was a fugitive from justice for more than a year. Following his arrest, appellant entered a plea of guilty to all fourteen counts. He was sentenced to thirty years imprisonment and a special parole term of five years. He subsequently filed a motion to set aside his guilty plea and to reconsider his sentence which was denied by the district court after appointment of counsel and a hearing on the matter.
Appellant then filed a petition2 under § 2255 which gave rise to this appeal. No evidentiary hearing was held; the district court ruled that appellant’s entry of a guilty plea precluded collateral review of most of his arguments and that the remaining claims were without merit. Accordingly, the district court entered an order denying appellant’s motion on December 21, 1977. Because the United States was a party to the action, the time for filing an appeal ran for sixty days, or until February 21,1978.3 On March 16, 1978 a letter-notice of appeal was received in this court and forwarded to the district court which received it on March 20,1978. The notice was received after the expiration of the sixty-day period, but within thirty days thereafter. It was thus received within the period during which the district court, upon a showing of excusable neglect, may extend the time for filing the notice of appeal.4 See Fed.R.App.P. 4(a).
The time limit set forth in Rule 4(a) is both “mandatory and jurisdictional.” Browder v. Director, Department of Corrections, 434 U.S. 257, 264, 98 S.Ct. 556, 54 L.Ed.2d 521 (1978). This court, then, may rule upon the merits of this appeal if, but only if, a determination of excusable neglect has been properly entered by the district court. We must therefore consider the proper course to follow when this court’s appellate jurisdiction rests upon an unresolved question of fact which may only be settled by a district court judge.
II.
We begin our analysis with the decision of this court in Torockio v. Chamberlain Manufacturing Co., 456 F.2d 1084 (3d Cir. 1972) (in banc). In Torockio, as in the case at bar, the notice of appeal had been filed “within the time to which the district court might have granted an extension” had the appellant made a showing of excusable neglect. Id. at 1086. A motion to dismiss the appeal on grounds of untimeliness presented this court with the issue “whether at this time any power remains in the district court to approve nunc pro tunc the filing of the notice of appeal . . ..” Id. We observed that the question would require re*232view of a prior Third Circuit decision in light of a change in the controlling appellate rules:
Commentators have suggested that Plant Economy, Inc. v. Mirror Insulation Co., 308 F.2d 275, 278 (3d Cir. 1962) prohibits such a result. The court considering a similar problem arising under Fed. R.Civ.P. 73(a) said:
“The [district] court was then [87 days after entry of judgment] without power to enter a valid order of extension.”
When Fed.R.App.P. 4(a) superseded Fed. R.Civ.P. 73(a) the language of the former rule was changed. The Notes of the Advisory Committee on Appellate Rules, Fed.R.App.P. 4(a), suggests, however, and commentators have assumed that the difference in language between Fed.R.Civ.P. 73(a) and Fed.R.App.P. 4(a) was not intended to affect a change in the above quoted holding of the Plant Economy case. See, e. g., 9 J. Moore, Federal Practice Par. 204.13(2) (2d ed. 1970). If Plant Economy continues to control, the untimeliness of the July 28, 1971 notice of appeal must be considered irremediable at this time.
Id. (footnote omitted).
Recognizing that the rules did not require the clerk of court to notify an appellant of the date on which his notice of appeal was filed, we observed in Torockio that a party “could remain ignorant of the need to make a motion pursuant to Rule 4(a) until after the expiration of the second thirty days.” Id. at 1087. Because such an inequitable result did not seem consistent with the appellate rules, we held that
if, as here, a notice of appeal is filed more than thirty but less than sixty days after the entry of the judgment appealed from the district court may at any time consider a motion to validate the filing within the second thirty days for excusable neglect. To the extent that Plant Economy, Inc. v. Insulation Co., supra, holds otherwise that case is overruled.
Id. (emphasis added). Because Torockio overruled prior case law in this circuit, we remanded the record to the district court to consider the excusable negiect question.
The issue before us today is whether we should extend Torockio to require a remand whenever this court is confronted by a record presenting the question of fact, resolvable only in the district court, of whether excusable neglect would warrant the tardy filing of a notice of appeal.5 We do not believe we have the power to remand the case to the district court.6 Chief Justice *233Chase concisely stated the controlling precept more than a century ago: “Without jurisdiction the court cannot proceed at all in any cause. Jurisdiction is power to declare the law, and when it ceases to exist, the only function remaining to the court is that of announcing the fact and dismissing the cause.” Ex Parte McCardle, 74 U.S. (7 Wall.) 506, 514, 19 L.Ed. 264 (1868).
We add, however, that our dismissal of the appeal is without prejudice to an application by McKnight in the district court for a ruling upon the question of excusable neglect.7 Furthermore, should such a determination be made in the appellant’s favor, our dismissal today clearly will not affect his subsequent appeal to this court or an eventual ruling upon the merits of his § 2255 petition; the doctrine of res judicata, which only attaches to final judgments upon the merits of a case or controversy, would be inapplicable to a subsequent appeal. Commissioner of Internal Revenue v. Sunnen, 333 U.S. 591, 597, 68 S.Ct. 715, 92 L.Ed. 898 (1948); Hubicki v. ACF Industries, Inc., 484 F.2d 519, 524 (3d Cir. 1973).
The appeal will be dismissed.
. Although neither party has raised the question of jurisdiction, we are always required to examine our own jurisdiction before deciding the merits of an appeal. United States ex rel. Esola v. Groomes, 520 F.2d 830, 834 n. 16 (3d Cir. 1975).
. McKnight’s pro se petition alleged numerous grounds for relief. He claimed that his conviction was obtained as a result of an unlawfully induced guilty plea; that the conviction was based upon a coerced confession subsequently admitted into evidence in violation of his fifth amendment rights; that evidence was improperly obtained as the result of an unlawful arrest and an unlawful search; that a subsequent unlawful arrest on unrelated charges improperly influenced his federal prosecution; that he had been subject to “cruel and unusual punishment” at the time of his arrest; that he received ineffective assistance of counsel; and that his federal prosecution was barred by the double jeopardy clause.
. See Fed.R.App.P. 4(a), 26(a). Since proceedings under § 2255 are civil in nature, the time limits for filing a notice of appeal in civil cases are applicable. See Fitzsimmons v. Yeager, 391 F.2d 849, 851 (3d Cir.) (in banc), cert. denied, 393 U.S. 868, 89 S.Ct. 154, 21 L.Ed.2d 137 (1968). The 60-day appeal period ended on Sunday, February 19, 1978 and the following day was a legal holiday. Therefore, as provided in Fed.R.App.P. 26(a), the appellant had until February 21 to file a notice of appeal.
. In this case, the 30-day period expired on March 23, 1978.
. This course of action has been followed by several circuit courts under similar circumstances. See, e. g., Stirling v. Chemical Bank, 511 F.2d 1030 (2d Cir. 1975); Craig v. Garrison, 549 F.2d 306 (4th Cir. 1977); United States v. Umfress, 562 F.2d 359 (5th Cir. 1977); Reed v. Michigan, 398 F.2d 800 (6th Cir. 1968); Seshachalam v. Creighton University School of Medicine, 545 F.2d 1147 (8th Cir. 1976); United States v. Stolarz, 547 F.2d 108 (9th Cir. 1976); Alley v. Dodge Hotel, 163 U.S.App.D.C. 320, 501 F.2d 880 (1974); but see Brainerd v. Beal, 498 F.2d 901 (7th Cir.), cert. denied, 419 U.S. 1069, 95 S.Ct. 655, 42 L.Ed.2d 664 (1974).
A related question was presented to this court in Rothman v. United States, 508 F.2d 648 (3d Cir. 1975). In Rothman, however, there was conflicting evidence in the record as to whether the notice of appeal to this court had been filed during the normal appeal period rather than the additional 30-day period discussed in Torockio. We remanded in Rothman in order to allow the district court to determine if the appellant had done “all that could reasonably be expected” to file his notice of appeal properly. Rothman, supra, at 652. In a footnote, the Rothman court suggested that should the district court find that the notice of appeal was not filed in time, the appellant “may wish to file a motion requesting the district court to validate nunc pro tunc the filing of his notice of appeal for ‘excusable neglect.’ ” Id. at 652 n. 25.
. The inappropriate nature of a remand in such cases becomes clearer if one considers the possibility that the district court may find that excusable neglect has not been shown, and therefore this court was at all times without jurisdiction over the appeal. If the court of appeals lacked jurisdiction over the subject matter of the appeal, as distinguished from the authority to consider the threshold question of appellate jurisdiction, then it is obvious that the court of appeals never had the power to remand the proceeding to the district court.
. Rule 4(a) provides that “if a request for an extension is made after [the original period for filing a timely notice of appeal] has expired, it shall be made by motion with such notice as the court shall deem appropriate.”