1. Comandon, J., and Defonbrune, P., C.r. Soc. Biol., 130, 740–748 (1939).
2. Goldstein, L., and Jelinek, W., Expl Cell Res., 43, 51–55 (1966).
3. Keller, H. U., and Bessis, M., Nouv. Rev. Franc. Hem. (in the press).
4. Bessis, M., and Burtè, B., Texas Rep. biol., Med. Suppl. 1, 23, 204–212 (1965).
5. Griffin, F. M., and Silverstein, S. C., J. exp. Med., 139, 323–336 (1974).