USILLA (Οὐσίλλα, Ptol. 4.3.10), a place in, Byzacium in Africa Proper.
It is the Usula of the Itin. Ant. (p. 59), lying between Thysdrus and Thenae. Variously identified with Inchilla or Sidi Makelouf, and Inshillah. [T.H.D]
Dictionary of Greek and Roman Geography, illustrated by numerous engravings on wood. William Smith, LLD. London. Walton and Maberly, Upper Gower Street and Ivy Lane, Paternoster Row; John Murray, Albemarle Street. 1854.