SOME EXAMPLES OF

product manifolds. In this paper we give strict examples of these classes, showing that none of them is vacuous, and that the inclusion relations among them are strict. The basic riemannian manifolds for the construction of these examples are submanifolds of C"+1 and Hn+] (C = complex field, H = quaternion field), and we use the canonical complex structures on these vector spaces. Perhaps the most interesting examples are those of minimal foliations which are not totally geodesic foliations.