抄録
1. Since the publication of my last paper (Chino 1936-37), about 135 mutant characters have been discovered. Of these 49 are due to new genes, while the rest are alleles of the genes described in that paper.
2. The new genes with accompanying data are listed in Table 2.
3. New chromosome maps of D. virilis virilis are published (Fig. 1, pp. 186-187).
4. In Table 1 (pp. 188-189) are given the summarized linkage data.
