  It is shown that surface waves with twelve different velocities in the cases
of different magneto-electrical boundary conditions can be guided by the
interface of two identical magneto-electro-elastic half-spaces. The plane
boundary of one of the half-spaces is clamped while the plane boundary of the
other one is free of stresses. The 12 velocities of propagation of these
surface waves are obtained is explicit forms. It is shown that the number of
different surface wave velocities decreases from 12 to 2 if the
magneto-electro-elastic material is changed to a piezoelectric material.
