For pt.I see ibid., vol.60, no.5, 2111 (1974). Equations of motion are derived for an equivalent macroscopic continuum at low velocity gradients. A general method is presented for obtaining the relaxation modulus of any model without internal potentials. Two cases are considered: a rigid model with two, equal, principal moments of inertia; and a freely jointed three-bead-two-rod model. It is shown that dominant relaxation times exist for each model.