  Recently S.Galam and A.Mauger [Phys.Rev.E 56, 322 (1997); cond-mat/9706304 ]
proposed an approximant which relates the bond and the site percolation
threshold for a particular lattice. Their formula is based on a fit to exact
and simulation results obtained earlier for different periodic and aperiodic
lattices. However, the numerical result for an aperiodic dodecagonal lattice
does not agree well with the proposed formula. I present here new and more
precise data for this and other aperiodic lattices. The previously published
value for the dodecagonal lattice is confirmed. The reason for the deviation
from the Galam and Mauger approximant is discussed.
