  The spectrum of baryons containing heavy quarks of one flavor is described in
terms of representations of the group SU(2) X SU(6), where the two factor
groups refer to spin rotations of the heavy quarks and spin-flavor rotations of
the light quarks, respectively. This symmetry has a natural interpretation in
the heavy quark limit. We exhibit the decomposition of baryon mass operators
under this symmetry and compare to experimental results. We discuss the
relation of this analysis to that of large-N_c QCD as well as four-flavor
SU(8), and indicate the generalization of this work to other properties of
heavy baryons.
