For pt.I see abstr. A50562 of 1975. The forms of the magnetothermoelectric power tensor alpha _ij(B) for each of the 32 point groups have been obtained by use of the transformation law for field-dependent tensors in conjunction with Neumann's principle. These forms provide a fundamental base for studies of the thermomagnetic effects; the even and odd terms of alpha _ij(B) in magnetic induction B are defined as the magneto-Seebeck and Nernst effects respectively. The symmetry restrictions imposed in current expressions for the phonon-drag and diffusion thermopowers are shown to produce different forms for alpha _ij(B); these two contributions to the magnetothermoelectric power can be separated by a detailed study of certain components of alpha _ij(B). An an example, the form taken by alpha _ij(B) for bismuth is discussed. It is shown from both phenomenological and band-structure considerations that the appearance of the Umkehr effect in alpha _ij(B) is not anomalous but is a direct result of crystal anisotropy.