The Rt. Rev. Augustine F. Hickey will retire Sunday as pastor of St. Paul's Church after 40 years at the parish. The Church is on Bow St. across from Adams House.

Monsignor Hickey, also the Vicar General of the Archdiocese of Boston, will be replaced by the Rev. Joseph I. Collins, who will take over his parish duties. Farther Collins, advisor to the Harvard-Radcliffe Catholic Society, will assume the title of administrator.