In the Volscian territory lay the little town of Velitrae (Velletri), the birthplace of Augustus.
It shows on the one hand the labialization of the original velar q(Volscian pis = Latin quis), and on the other hand it palatalizes the guttural c before a following i (Volscian facia=Latin faciat).
Like Umbrian also, but unlike Latin and Oscan, it has degraded all the diphthongs into simple vowels (Volscian se parallel to Oscan svai; Volscian deue, Old Latin and Oscan deivai or deiuoi).
South of Palestrina again, the main mass of the Apennines throws off another lateral mass, known in ancient times as the Volscian mountains (now called the Monti Lepini), separated from the central ranges by the broad valley of the Sacco, a tributary of the Liri (Liris) or Garigliano, and forming a large and rugged mountain mass, nearly 5000 ft.
Besides these offshoots of the Apennines there are in this part of Central Italy several detached mountains, rising almost like islands on the seashore, of which the two most remarkable are the Monte Argentaro on the coast of Tuscany near Orbetello (2087 ft.) and the Monte Circello (1771 ft.) at the angle of the Pontine Marshes, by the whole breadth of which it is separated from the Volscian Apennines.