The confederate tribes are variously enumerated by different authors. A comparison of their lists enables us to ascertain the greater part of the names, and to form a probable conjecture as to the rest; but it also leads us to conclude that some changes took place at a remote period in the constitution of the council, as to which tradition is silent. The most authentic list of the Amphictyonic tribes contains the following names: Thessalians, Bœotians, Dorians, Ionians, Perrhæbians, Magnetes, Locrians, Œtæans or Enianians, Phthiots or Achæans of Phthia, Malians or Melians, and Phocians. The orator Æschines, who furnishes this list, shows, by mentioning the number twelve, that one name is wanting. The other lists supply two names to fill up the vacant place; the Dolopes, and the Delphians. It seems not improbable that the former were finally supplanted by the Delphians, who appear to have been a distinct race from the Phocians. The mere inspection of this list is sufficient to prove at once the high antiquity of the institution and the imperfection of our knowledge with regard to its early history. It is clear that the Dorians must have become members of the Amphictyonic body before the conquest, which divided them into several states, each incomparably more powerful than most of the petty northern tribes, which possessed an equal number of votes in the council. It may however be doubted, whether they were among the original members, and did not rather take the place of one of the tribes which they had dislodged from their seats in the neighbourhood of Delphi, perhaps the Dryopes. On the other hand the Thessalians were probably not received into the league, before they made their appearance in Thessaly, which is commonly believed to have taken place only twenty years before the Dorian invasion of the Peloponnesus. It is therefore highly probable that they were admitted in the room of some other tribe, which had lost its independence through the convulsions of this eventful period.