  The work is devoted to the description of baryon mass spectrum in the
quasy-relativistic quark potential model. For cosidering 3 - quark system
advantageous is the use of hyperspherical functions. For obtaining the mass -
seguence of $\Delta_{33}-$isobar the numerical computations were carryed out
with the use of screened QCD - motivated potential, the use of which gives
quite acceptable results even in the nonrelativistic approximation.
