per stirpes

from Bouvier's Law Dictionary, Revised 6th Ed (1856)
PER STIRPES. By stock; by roots. 
     2. When, for example, a man dies intestate, leaving children and 
grandchildren, whose parents are deceased, the estate is to be divided not 
per capita, that is, by each of the children and grandchildren taking a 
share, but per stirpes, by each of the children taking a share, and the 
grandchildren, the children of a deceased child, taking a share to be 
afterwards divided among themselves per capita. 
    

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