The Roman Missal: Proper of Saints, March and April (English) 28
1[April 26. Cletus and Marcellinus, Martyrs.—Semidouble.]
2[Mass.—Sancti tui Domine, for Martyrs in Paschal time, page xv, except—]
3Prayer. Beatorum. May the precious confession of the blessed martyrs and bishops, Cletus and Marcellinus, animate us, O Lord, and may their pious intercession ever defend us. Through our Lord, &c. Credo.
4[Commemoration of the Octave of St George, as on his feast, page 566. Credo is said.]