1. Department of Geology; University of Leicester; Leicester LE1 7RH
2. Graduate School of Environmental Studies; Nagoya University; Chikusa-ku Nagoya 464-8601 Japan
3. Graduate School of Science and Technology; Kumamoto University; 2-39-1 Kurokami Kumamoto 860-8555 Japan
4. Center for Marine Environment Studies; Kumamoto University; Kamiamakusa City Kumamoto 861-6102 Japan
5. The Nagoya University Museum; Nagoya University; Chikusa-ku Nagoya 464-8601 Japan