ACHILLBEG, an Island, in the parish of Achill, union of West-port, barony of Burrishoole, county ofMayo, and province of Con naught, 22 miles (W.) from Newport-Mayo ; containing 178 inhabitants. Thisisland is situated on the western coast, and on the north side of the entrance of Clew bay ; it is separatedfrom the larger island of Achill by a narrow sound, which in...