B2. Perforin in earthworm coelomocytes. Kazuo Komiyama, Makoto Yoshimura, Masahiko Okaue, Takashi Iwase, Edwin L. Cooper, Ko Okumura and Itaru Mort: Department of Pathology, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101, Japan. Department of Neurobiology, Medical Center, University of California at Los Angeles, 90095, California, USA. Department of Immunology, untendo University School of Medicine, Bunkyo-ku, Tokyo, 113, Japan