As the record was written by a Roman Catholic priest whose work is based on matters parochial, I doubt he would loosely use the word "parish" to identify a placename (such as a townland) - he would be recording the identity of the parishioners by reference to the ecclesiastical parish they hail from.
The full record reads:
"On the 7th day of May 1850 after the laws of marriage having been thrice proclaimed at the principle mass between JOHN McCORMICK, Widower of the township of Seymour on the one part, and BIDDY CONWAY (of age) daughter to DANL CONWAY & HONOR ENRIGHT of the parish of Riccail, C. Lymrick, Ireland, now Seymour, on the other part. No impediment having been discovered, I the undersigned Priest of this mission have recd their mutual consent to marriage - Witness Timothy Coughlan & Margaret McAuly. Bernard I. Higgins."
Cheers, John