Amasenus
Amasenus a small river of Latium, still called the Amaseno, which rises in the Volscian mountains above Privernum, and descends from thence to the Pontine marshes, through which it finds its way to the sea, between Tarracina and the Circeian promontory. Before its course was artificially regulated it was, together with its confluent the Ufens, one of the chief agents in the formation of those marshes. Its name is not found in Pliny or Strabo, but is repeatedly mentioned by Virgil (Aen. 7.684, 11.547). Servius, in his note on the former passage, erroneously places it near Anagnia, evidently misled by the expressions of Virgil. Vibius Sequester (p. 3) correctly says Amasenus Privernatium.
From William Smith (ed.), Dictionary of Greek and Roman Geography. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.