A GENETICO-PHYSIOLOGICAL STUDY ON THE FORMATION ETC. 91 



EXPLAKATIOX OF PLATE I. 



Figures 1-10. The seeds of Olycim soja sliowing the colour of the seeil cont. Figures 11- 

 17. The spikelets o£ Orj/:a salivn slioning the colour of the avro. iiaU-.as ,iU'l glume. 



Fig. 1. " Wiireinarae ", buff. 



Fig. 2. " Achximnri ", solid blnck w ith the chnracteristic local hrcftkiDgs in the epidermis, 

 through which tlic colourless underlying tissue is shown. 



FiR. 3. F.J seed •• Wnremame " x '• Achurauri ", soliil binck without breakings in the coloured 

 ex>idernü.-i. 



Fig. 4. Fj seed "'Waremame"x" Achumuri", "imperfect bLick ". the ground colour brown. 



Fig. 5. K, seed " Wnremame " x •' Achumtiri ", brown. 



Fig. G. " 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. S. F3 seed •' Hniim " x " Tanishi ", non-tingeil green. 



lig. 9. F, seed " Hauro " x '• Tanishi " n^n-tingcd yellow. 



Fig. 10. P.J seed " Haiiro " x " Tanishi ", brown. 



Fig. 11. " Hanbun-nento ". Ijxrly stage in the development of the pigment. The awn red, 

 paJacs brown, and glume reil. 



Fig. 12. Same as Fig. 11. Later stage showing the development of the brown colour in the 

 palens. The fully rii)ed one is similar to that shown in Fig. 14. 



Fig. 13. " Grenroka-mochi ", purple localized in the paleas. 



Fig. 14. F3 " Hanljun-nento " x " Genroku-mochi ". Awn red, paleas brown. 



Fig. 15-17. F, •' Hanbun-nento " x " Genroku-mochi " showing the st.ages in the development 

 of purple pigment in the .iwn. paleas. and glume. The fuUy developed stage is shown in Fig. 

 17. 



POSTSCEIPT. 



The reference should be made to the following jiapers which have been received after the 

 manuscript left the writer's hand. 



Takahashi, Y. and Fckityajia. J., ( Jlorphologieal and Genetic Studies on the Soy Bean. 

 Hokkaido Agric. Exp. Station Report No. 10, 1919.) reix)rtcd the results of a number of crosses 

 made between the different varieties grown in Hokkaido, in which certain colovu 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^ , a green seed and segregated in F^ , green and fiale yellow 

 by the ratio 3:1. In the subsequent generation, however, browns and rcils appeared. Brown x 

 pale yellow produced in Fj , a pale yello%v seed, and segregated in F^ , 29 pale yellows and 2 



