being distributed as follows: in the first class eight, in the second, third, and fourth respectively two, in the fifth three.[1300] But bearing in mind that these tribes were primarily local, we cannot at the same time regard them as census groups without ascribing to them an impossibly artificial character. For this reason the theory of Huschke should be rejected. To avoid this difficulty, while retaining the classes, the assumption has been made that the classes were subdivisions of the century, in other words that each century contained men of every class. This view is invalidated by the fact that the centuries continued to be divisions of the classes, which were still called to vote in their order.[1301] The assumption of a diminution in number having proved untenable, the conclusion is that there was an increase.[1302] In view of the facts (1) that the reformed organization rested on a tribal basis,[1303] (2) that the centuries were divisions not only of the tribes[1304] but also of the classes,[1305] (3) that the tribes could not have been divisions of the classes,[1306] it is necessary to conclude that the classes were themselves divisions of the tribes with the centuries as subdivisions. In other words, the work of organization took place within the tribe: the members of a tribe were first divided into five classes according to their wealth; within each class the men were grouped on the basis of age into juniors and seniors,[1307] one century for each within the several classes, making ten centuries of juniors to the tribe, or in all three hundred and fifty tribal centuries, to which are to be added eighteen centuries of knights and probably five supernumerary centuries, amounting to a total of three hundred and seventy-three. This is substantially the view of Pantagathus.[1308] Convincing evidence is afforded by a group of inscriptions of the imperial period.[1309] From them we learn that under the emperors the urban tribes comprised severally (1) a corpus seniorum, (2) a corpus iuniorum, (3) the tribus Sucusana a corpus Iulianum, and the Palatine and Esquiline each a corpus Augustale. Every corpus consisted of several centuries. In the corpus Sucusana iuniorum were eight centuries divided into two groups of five and three respectively, the first group being evidently superior to the second. At the head of the century was a centurio or curator.[1310] Eliminating the corpora which were named after emperors and which must have been instituted in their time, eliminating also the inferior centuries of the corpora seniorum and iuniorum, which were undoubtedly added either by the emperors or by the late republican censors, we have remaining five centuries to the corpus as it must have stood in the period immediately following the reform. This result confirms the view suggested by Pantagathus.