  We study the possibility that four iso-singlet baryons $\Lambda_s(1405)$
$J^P=1/2^{-}$, $\Lambda_s(1520)$ $J^P=3/2^{-}$, $\Lambda_c(2593)$ $J^P=1/2^{-}$
and $\Lambda_c(2625)$ $J^P=3/2^{-}$ are hybrids: three quark one gluon states
(udsg). We calculate the mass separations of the candidates, using a
degeneracy-lifting hyperfine interaction from an effective single colored gluon
exchange between the constituents. The correct ordering of masses is obtained
(contrary to the case for the conventional interpretation as 3 quarks with L=1)
and the splittings are plausible. The parity of these states is not measured,
only assumed to be negative. In the hybrid picture, the lightest states are
parity even and the parity odd counterparts lie about 300 MeV higher. Thus the
hybrid ansatz predicts that either the parity of the $\Lambda(1405)$ etc is
positive, or that there are undiscovered positive parity states about 300 MeV
lower. We also remark that in this picture, the H-dibaryon mass may be around
1.5 GeV.
