Prakken's theory for seed colorations in dry Phaseolus Vulgaris beans is summarised. Some modifications aree proposed in order to explain anomalies which appear in crosses between West Indian lines: 1. the possibility of new C alleles; 2. the existence among Haitian beans of a type of mottling which is not induced by C alleles; 3. the existence of a third allele , rki at the rk locus, besides RK and rk; and 4. the strong linkage between bright red, uniform or striped pod coloration, and the Crst gene. Two practical applications arc quoted as examples.