In the case of a will made or an intestacy occurring on or after the first day of January 1866,"Heir" shall mean any person claiming an interest in the immoveable property of a deceased person under the rules for the distribution of an intestate's estate; and "Devisee" shall mean any person taking immoveable property under a bequest, and any person, other than an executor or administrator, claiming an interest in immoveable property, not as entitled thereto under the said rules, but by a title dependent solely upon the operation of the laws concerning intestate and testamentary succession.