That the Donatists were called at Rome Montenses, is observed by Augustine, de Hœresibus, c. xxix., and Epist. liii. 2; and before him by Optatus, Book II. That they were also called Cutzupitani, or Cutzupitæ, we learn from the same epistle, and from his treatise de Unitate Ecclesæ, c. iii.