1. Pinoy, P. E., Ann. Inst. Pasteur, 35, 487 (1921).
2. Solntzeva, L. I., Microbiologia (U.S.S.R.), 8, 700 (1939).
3. Beebe, Iowa State College J. Sci., 15, 319 (1941).
4. Snieszko, S. F., McAllister, J., and Hitchner, E. R., Quart. Bull. Polish Inst. Arts and Sci. in America, 1, 651 (1943).
5. Singh, B. N., J. Gen. Microbiol., in the press.