  I describe a unified formalism for lattice fermions, in which the
relativistic action of Wilson and the nonrelativistic and static actions appear
as special cases. It is valid at all values of $m_q a$, including $m_q a
\approx 1$. In the limit $m_q a \ll 1 $, the formulation reduces to the light
quark action of Wilson. In the limit $m_q a \gg 1 $, the formulation reduces to
the nonrelativistic action of Thacker and Lepage, and to the static action of
Eichten.
