whom Tacitus calls (Ann. 6.47) "vetustis honoribus studiisque illustris," is first mentioned in A. D. 19 as one of the most likely persons to obtain the government of Syria, but he gave way to Cn. Sentius. In the same year he was sent to summon Piso to Rome to stand his trial. His name occurs again in A. D. 26, in the debates of the senate; and just before the death of Tiberius (A. D. 37) he narrowly escaped death, being accused as one of the accomplices of Albucilla. In A. D. 47 we find him governor of Syria. (Tac. Ann. 2.74, 79, 4.56, 6.47, 48, 11.10.) The name of C. Vibius Marsus, proconsul, appears on several coins of Utica in Africa, struck in the reign of Tiberius: they probably relate to the same person as the one mentioned above; and as he was disappointed in obtaining the province of Syria in the reign of Tiberius, he may have been appointed to that of Africa. (Eckhel, vol. iv. pp. 147, 148.)