2. Paired pericarp mosaics, especially those that may occur in plants heterozygous for P^RW and P^WR, would make possible a distinction between reciprocal translocation and somatic crossing over. In plants of this composition red-seeded, red-cobbed ears would show colorless seeds underlaid with red cob adjacent to colored seeds over white cob. Any mosaics of this type should be examined cytologically and put on record. The writer would appreciate having any of these mosaics, especially where the areas involved cover several seeds.

D. F. Jones