1. B.M. Sutherland, Biology Dep. Brookhaven National Laboratory Upton NY 11973‐5000
2. Kyoto Univ. Gokanoshi, Uji Kyoto 611‐0011 Japan
3. Institute of Genetic Ecology Tohoku Univ. Sendai Japan
4. Dep. of Pathology Biological and Biomedical Sciences Program Harvard Medical School Boston MA 02115
5. Dep. of Natural Resource Science and Landscape Architecture Univ. of Maryland College Park MD 20742
6. Argonne National Laboratory Argonne IL 60439
7. Dep. of Biology Toho Univ. School of Medicine Tokyo Japan