PENARTH (PEN-ARTH), a parish, in the union of CARDIFF, hundred of DINASPOWYS, county of GLAMORGAN, SOUTH WALES, on the shore of the Bristol Channel, 6 miles (S.) from Cardiff; containing 110 inhabitants. It is situated on the western side of the harbour or roadstead of Cardiff, formed by the junction of the rivers Ely and Tfif, near their influx into the sea; the shore is pebbly, and the cliffs contain various strata of alabaster. Penarth Roads form an excellent haven during the prevalence of westerly winds, and five hundred sail may ride here in safety. A neat inn has been lately erected on the shore, by, the Earl of Plymouth, for the convenience of mariners, or persons desirous of the sea air. The living is a discharged rectory, with that of Lavernock annexed, endowed with a rent-charge of £50 by Thomas Lewis, in 1716, and in the income, age of the Earl of Plymouth; present net ncome, £186. The church, dedicated to St. Augustine, stands upon a rocky promontory at the mouth of the harbour, and serves as a landmark to vessels sailing up and down the channel. In the parish is a ruin, now converted into a barn, which was formerly a chantry chapel, probably connected with, or served by the monks of, the monastery of Llandough super Ely.