For a great article on the subject, see http://www.newadvent.org/cathen/09306a.htmThat is a good article, I highly recommend its reading for those who think the Tridentine sprung cut from whole cloth by the Apostles or from our Lord at the Last Supper. A couple paragraphs:
With regard to the first question it must be said that an Apostolic Liturgy in the sense of an arrangement of prayers and ceremonies, like our present ritual of the Mass, did not exist. For some time the Eucharistic Service was in many details fluid and variable. It was not all written down and read from fixed forms, but in part composed by the officiating bishop. As for ceremonies, at first they were not elaborated as now. All ceremonial evolves gradually out of certain obvious actions done at first with no idea of ritual, but simply because they had to he done for convenience. The bread and wine were brought to the altar when they were wanted, the lessons were read from a place where they could best be heard, hands were washed because they were soiled. Out of these obvious actions ceremony developed, just as our vestments developed out of the dress of the first Christians. It follows then of course that, when there was no fixed Liturgy at all, there could be no question of absolute uniformity among the different Churches.. . .
And yet the whole series of actions and prayers did not depend solely on the improvisation of the celebrating bishop. Whereas at one time scholars were inclined to conceive the services of the first Christians as vague and undefined, recent research shows us a very striking uniformity in certain salient elements of the service at a very early date. The tendency among students now is to admit something very like a regulated Liturgy, apparently to a great extent uniform in the chief cities, back even to the first or early second century. In the first place the fundamental outline of the rite of the Holy Eucharist was given by the account of the Last Supper. What our Lord had done then, that same thing He told His followers to do in memory of Him. It would not have been a Eucharist at all if the celebrant had not at least done as our Lord did the night before He died. So we have everywhere from the very beginning at least this uniform nucleus of a Liturgy: bread and wine are brought to the celebrant in vessels (a plate and a cup); he puts them on a table -- the altar; standing before it in the natural attitude of prayer he takes them in his hands, gives thanks, as our Lord had done, says again the words of institution, breaks the Bread and gives the consecrated Bread and Wine to the people in communion. The absence of the words of institution in the Nestorian Rite is no argument against the universality of this order. It is a rite that developed quite late; the parent liturgy has the words.
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From about the fourth century our knowledge of the Liturgy increases enormously. We are no longer dependent on casual references to it: we have definite rites fully developed. The more or less uniform type of Liturgy used everywhere before crystallized into four parent rites from which all others are derived. The four are the old Liturgies of Antioch, Alexandria, Rome, and Gaul. Each is described in a special article. It will be enough here to trace an outline of their general evolution
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In any case the old Roman Rite is not exactly that now used. Our Roman Missal has received considerable additions from Gallican sources. The original rite was simpler, more austere, had practically no ritual beyond the most necessary actions (see Bishop, "The Genius of the Roman Rite" in "Essays on Ceremonial", edited by Vernon Staley, London, 1904, pp. 283-307). It may be said that our present Roman Liturgy contains all the old nucleus, has lost nothing, but has additional Gallican elements. The original rite may be in part deduced from references to it as early as the fifth century ("Letters of Gelasius I" in Thiel, "Epistolæ Rom. Pontificum", I, cdlxxxvi, "Innocent I to Decennius of Eugubium", written in 416, in P. L., XX, 551; Pseudo-Ambrose, "De Sacramentis", IV, 5, etc.); it is represented by the Leonine and Gelasian "Sacramentaries", and by the old part of the Gregorian book (see LITURGICAL Books).