[117] xiii. 6621. One might add M. Mucius Hegetor medicus of the Cohors XXXII Voluntariorum in Pannonia, iii. 10854.
[118] Lucian mentions a doctor of an auxiliary cohort who wrote a history of the Parthian war of Marcus and Verus and must have been a man of some education. Lucian, de hist. conscrib. 24.
[119] Von Dom. Rangordnung, p. 26.
[120] The record of the career of C. Iulius Dexter quoted above is quite exceptional. Usually only one post is mentioned.
[121] iii. 11213 gives the sequence eques-optio-decurio, and 8762 that of eques-vexillarius-decurio, but such details are rare.
[122] The principales would be the vexillarius alae, the optio singularium, and a duplicarius and sesquiplicarius to each turma. Of the immunes each turma has its signifer, custos armorum, and curator. The total number of the beneficiarii, &c., we do not know, but the inscription of the Equites Singulares quoted above suggests an average of three to a turma. In a cohors quingenaria with only 6 commissioned officers and 19 principales (the imaginifer cohortis and the signifer, optio, and tesserarius of each century) the chances of promotion would be less. This is another reason for the popularity of the cavalry and the desire of cohorts to become equitata. Cf. Tac. Hist. iv. 19.
[123] The Ala Indiana may have been called after the Trevir Iulius Indus mentioned in Tac. Ann. i. 42, the Ala Siliana after C. Silius the general of Tiberius, and the Ala Pannoniorum Tampiana after Tampius Flavianus, governor of Pannonia in 69. The last case, however, is doubted by von Domaszewski, Rangordnung, p. 122, n. 6.
[124] The only cases known at present are the cohorts Lepidiana and Apuleia civium Romanorum, and a Cohors Flaviana only known from a cursus honorum.
[125] The name of the tribe was usually in the genitive plural but might also be in the nominative singular. Thus we find the same regiment described as Cohors I Alpinorum and Cohors I Alpina. The question of duplicate numbering, which is connected with the system of recruiting and distribution, is discussed in the following section.
[126] The fact that the numerous regiments bearing this title appear in the diplomata shows that the status of their members was not permanently raised. One regiment, the Cohors II Tungrorum, bears the title C(ivium) L(atinorum), Eph. Ep. ix. 1228.