Special Issue: Pattern Formation and Information Processing on the Sphere Preface: Why Spheres? Tohru Ogawa, Masaharu Tanemura and Takayuki Hirata Forma, Vol. 13 (No. 2), pp. 47-50, 1998 [Preface] A New Aspect of Spherical Harmonics Tohru Ogawa Forma, Vol. 13 (No. 2), pp. 51-62, 1998 Variable Polyhedric Patterns on a Sphere Derived from Regular and Semi-Regular Polytopes in Four-Dimensional Space Koji Miyazaki Forma, Vol. 13 (No. 2), pp. 63-80, 1998 [Abstract] A Local Painting Rule on Truncated Icosahedron to Generate a Soccer Ball Pattern Takayuki Hirata Forma, Vol. 13 (No. 2), pp. 81-97, 1998 [Abstract] Random Packing and Tessellation Network on the Sphere Masaharu Tanemura Forma, Vol. 13 (No. 2), pp. 99-121, 1998 [Abstract] Quantization of Electrons on Closed Surfaces: Sphere and Fullerenes Hideo Aoki Forma, Vol. 13 (No. 2), pp. 123-131, 1998 [Abstract] A Configuration of Random Points on a Sphere Generated by Central Symmetric Density Yoshiaki Itoh Forma, Vol. 13 (No. 2), pp. 133-136, 1998 [Abstract] The Meaning of the Water Planet Earth Atsushi Tsuchida and Takeshi Murota Forma, Vol. 13 (No. 2), pp. 137-143, 1998