  The observed inclusive decay of B-mesons into eta' + X is interpreted as the
consequence of the gluonic decay of the b-quark into an s-quark. As a result of
the QCD anomaly this decay proceeds partly as the decay b ---> s + eta',
similar to b ---> s + J/psi. The hadronic recoiling system is found to have a
relatively large mass. Analogously one expects a decay of the type b ---> s +
sigma. The branching ratios for these decays are large (of the order of 10%).
The results indicate that there is no room for an anomalously large
chromomagnetic decay mode of the b-quark. Gluon jets are expected to exhibit an
anomalously large tendency to fragment into eta'- and sigma-mesons.
