  We study elliptic solutions of the recently introduced Toda lattice with the
constraint of type B and derive equations of motion for their poles. The
dynamics of poles is given by the deformed Ruijsenaars-Schneider system. We
find its commutation representation in the form of the Manakov triple and study
properties of the spectral curve. By studying more general elliptic solutions
(elliptic families), we also suggest an extension of the deformed
Ruijsenaars-Schneider system to a field theory.
