The dynamical model of rotational diffusion of rod·shaped molecules in a conical volume is applied to the calculation of time autocorrelation functions of 1st and 2nd order spherical harmonic functions of the rod's orientation angles. Numerical results are obtained for the various correlation functions as a function of the polar angle 8 0 within which the molecule's axis is confined. Applications to dielectric relaxation, dynamic light scattering, and fluorescence depolarization experiments are pointed out. n where ~II' (J.L), usually called associated the Legendre func-