  FMS modes are studied in the model of the magnetotail as a cylinder with
plasma sheet. The presence of the plasma sheet leads to a significant
modification of the modes existing in the magnetotail in the form of a cylinder
with no plasma sheet. Azimuthal scales of the FMS modes differ significantly
between the lobes and the plasma sheet. The azimuthal scale in the plasma sheet
is much smaller than that in the magnetotail lobes. FMS waves with certain
parameters are strongly reflected from the boundary between the lobes and the
plasma sheet and are very weak in the plasma sheet.
