Paschasinus a Romish prelate of note in his day, flourished near the middle of the 5th century. We first encounter him in A.D. 451, when he was bishop of Lilybaeum, in Scily, as papal legate at the Council of Chalcedon. He there represented the interests of the Roman pontiff, together with Lucentius, bishop' of Asculum, and Bonifacius, a presbyter. Paschasinus, of whose previous history and position in life we know nothing, seems to have held the chief place among the three legates, since he subscribed the acts of the council in the name of the pope before the two others. An epistle of Paschasinus, De Quaestione Paschali, is still extant, addressed to Leo in reply to some inquiries from the pontiff with regard to the calculations for determining the festival of Easter. It will be found under its best form in the editions of the works of Leo published by Quesnel and by the brothers Ballerini. See Schonemann, Biblioth. Patrum Lat. vol. ii, § 49; Bahr, Geschichte der ionm. Literatur, suppl. vol. pt. ii, § 166; Smith, Dict. of Greek and Roman Biog. and Mythol. 3:131; Ceillier, Hist. des Aut. Sacrls, 10:170-175, 201 sq., 682 sq., 701.