1. ; Department of Biology, Faculty of Science; Kobe University; Kobe 657 Japan
2. Laboratory of Biology; Chiben Gakuen High School; Gojo 637 Japan
3. ; Department of Science Education, Faculty of Education; Yamagata University; Yamagata 990 Japan
4. The Yomiuri Press; Osaka 530 Japan
5. ; Water Research Institute; Nagoya University; Nagoya 464 Japan
6. ; Shiretoko Museum; Shari-cho 0999-41 Japan