[POMPONIUS libro quarto ad Quintum Mucium. ] §7.4.31.prCum gregis usus fructus legatus est et usque eo numerus peruenit gregis, ut grex non intellegatur, perit usus fructus.
[POMPONIUS in the fourth book on Quintus Mucius.] When the usufruct of a flock is bequeathed, and the number of the flock has reached such a point that it is no longer understood to be a flock, the usufruct is extinguished.