1. Cantone, A., and Capraro, V., Boll. Soc. It. Biol. Sper., 34, 105 (1958).
2. Cantone, A., and Capraro, V., Boll. Soc. It. Biol. Sper. (in the press).
3. Heilbrunn, L. V., “The Dynamics of Living Protoplasm” (Academic Press, New York, 1956).
4. Cantone, A., and Capraro, V., Boll. Soc. It. Biol. Sper., 33, 126 (1957).
5. Marro, F., Boll. Soc. It. Biol. Sper. (in the press).