[XC.] Homole and Othrys were mountains in Thessaly.
[XCI.] The Anio flows through the hills near Tibur, and joins the Tiber close to 'Antemnae's tower-girt height.' Cf. [stanza lxxxiv.]
Anagnia was the largest town of the Hernici, and Amasenus was a river of Latium.
[XCIII.] All these places were close to each other in Etruria, a few miles north of Rome.
[XCIV.] It is probable that this passage was left unfinished by Virgil. The simile is taken from Homer, and used here in two different ways, the poet evidently postponing his final decision as to which he would adopt, until he revised the poem.