1. Goodey, T., “Laboratory Methods for Work with Plant and Soil Nematodes” (London, 1949).
2. Oostenbrink, M., Versl. en Meded. Plantenziektenkundige Dienst, No. 115 (1950), and personal communication (1954).
3. Peters, B. G., and Fenwick, D. W., Ann. App. Biol., 36, 334 (1949).
4. Jones, F. G. W., personal communication (1954).