PETROX-ST, a parish, in the hundred of CASTLEMARTIN, union of PEMBROKE and county of PEMBROKE, SOUTH WALES, 3 miles (S. W.) from Pembroke; containing 92 inhabitants. This parish, which is also called Llan Bedrog, derives its name from the dedication of its church to Pedrog, a British saint, who flourished about the commencement of the seventh century. It comprises bat a very moderate tract of arable and pasture land, and is chiefly distinguished for the salubrity of the air, and the longevity of its inhabitants; the surface is varied, and the soil fertile; and the rateable annual value of property has been returned at £898. 13. 4. The living is a discharged rectory, rated in the king's books at £7. 3. 9.; net income, £154; patron, Earl Cawdor: the tithes have been commuted for a rent-charge of £116; of which £70 are payable to the impropriator, and £46 to the rector, who has also a glebe of 44acres, valued at £68 per annum. The benefice was united in 1839 to the rectory of Stackpool-Elidur; and a portion of the tithes has been taken to increase the living of Castlemartin, under an act of .parliament. The church, dedicated to St. Pedrog, is a neat edifice, with a handsome aquae tower, and is situated on an eminence commanding a good view over the adjacent country. Attached to the living is a comfortable glebe-house, pleasantly situated and in good repair.