  A generalization of the eight vertex model by means of higher spin
representations of the Sklyanin algebra is investigated by the quantum inverse
scattering method and the algebraic Bethe Ansatz. Under the well-known string
hypothesis low-lying excited states are considered and scattering phase shifts
of two physical particles are calculated. The $S$ matrix of two particle states
is shown to be proportional to the Baxter's elliptic $R$ matrix with a
different elliptic modulus from the original one.
