  Mass distributions of the fragments in the fission of $^{206}$Po and the
N=126 neutron shell closed nucleus $^{210}$Po have been measured. No
significant deviation of mass distributions has been found between $^{206}$Po
and $^{210}$Po, indicating the absence of shell correction at the saddle point
in both the nuclei, contrary to the reported angular anisotropy and
pre-scission neutron multiplicity results. This new result provides benchmark
data to test the new fission dynamical models to study the effect of shell
correction on the potential energy surface at saddle point.
