A GENETICOPHYSIOLOGICAL STUDY ON THE FORMATION ETC. 
91 
EXPLANATION OF PLATE I. 
Figures 1-10. The seeds of Glycine soja showing the colour of the seed coat. Figures 11- 
17. The spikelets of Oryza sativa showing the colour of the awn, paleas and glume. 
Fig. 1. “ Waremame ”, buff. 
Fig. 2. “ Achumuri ”, solid black with the characteristic local breakings in the epidermis, 
through which the colourless underlying tissue is shown. 
Fig. 3. F 3 seed “ Waremame ” x “ Achumuri ”, solid black without breakings in the coloured 
epidermis. 
Fig. 4. F 3 seed “ Waremame ” x “ Achumuri ”, “ imperfect black ”, the ground colour brown. 
Fig. 5. F 3 seed “ Waremame ” x“ Achumuri ”, brown. 
Fig. 6. “ Haiiro ”, brown with green tinge. The greyish green tinge shown in this figure 
changes to brown as shown in Fig. 10 when the seed is kept long. 
Fig. 7. “ Tanishi ”, blue tinged yellow. 
Fig. 8. F 3 seed “ Haiiro ” x “ Tanishi ”, non-tinged green. 
Fig. 9. F 3 seed “ Haiiro ” x “ Tanishi ” non-tinged yellow. 
Fig. 10. F 3 seed “ Haiiro ” x “ Tanishi ”, brown. 
Fig. 11. “ Hanbun-nento ”. Early stage in the development of the pigment. The awn red, 
palaes brown, and glume red. 
Fig. 12. Same as Fig. 11. Later stage showing the development of the brow’n colour in the 
paleas. The fully riped one is similar to that shown in Fig. 14. 
Fig. 13. “ Genroku-mochi ”, purple localized in the paleas. 
Fig. 14. F 3 “ Hanbun-nento ” x “ Genroku-mochi ”. Awn red, paleas brow n. 
Fig. 15-17. Fj “ Hanbun-nento ” x “ Genroku-mochi ” showing the stages in the development 
of purple pigment in the awn, paleas, and glume. The fully developed stage is shown in Fig. 
17. 
POSTSCEIPT. 
The reference should be made to the following papers which have been received after the 
manuscript left the writer’s hand. 
Takahashi, Y. and Fukuyama. J., (Morphological and Genetic Studies on the Soy Bean. 
Hokkaido Agric. Exp. Station Report No. 10, 1919.) reported the results of a number of crosses 
made between the different varieties grown in Hokkaido, in which certain colour characters of the 
seed coat are treated. Unfortunately the material is presented without genetical analysis owing 
to the incompleteness of the data. The following is the main results. 
Pale yellow x green gave in F t , a green seed and segregated in F 2 , green and pale yellow 
by the ratio 3:1. In the subsequent generation, however, browns and reds appeared. Brown x 
pale yellow produced in F x , a pale yellow seed, and segregated in F 2 , 29 pale yellows and 2 
