County of ANTRIM , a maritime county in the province of ULSTER, bounded on the north by the Northern Ocean, or Deucaledonian Sea; on the north-east and east, by the North Channel; on the south-east, by the lough or bay of Belfast and the river Lagan, separating it from the county of Down, which likewise borders it on the south; on the south-west, by Lough Neagh; on the west, by Lough Beg and the river Bann, which separate it from the county of Londonderry, and on the north-west, by the liberties of Coleraine.