A GENETICO-PHYSIOLOGICAL STUDY ON THE FORMATION ETC. 
55 
F 3 family no. 
Self black 
Imperfect 
black 
Brown 
Buff 
Total 
10 
4 
1 
1 
16 
12 
12 
4 
1 
5 
22 
18 
26 
8 
10 
2 
46 
19 
35 
13 
13 
6 
67 
23 
21 
7 
9 
4 
41 
25 
23 
9 
7 
3 
42 
26 
24 
15 
14 
q 
O 
56 
27 
26 
10 
3 
3 
42 
33 
40 
14 
9 
7 
70 
Total 
315 
115 
98 
43 
571 
Expected 
322.18 
107.06 
107.06 
35.69 
Probable errors 
±7.481 
±6.291 
±6.291 
±3.962 
Diff. (ob.-exp.) 
—6.18 J 
+ 7.94 
-9.06 
+7.31 
What is designated as imperfect black is a new type. It differs from 
tlie self black by the incomplete development of tlie antkocyanin pigment, 
resulting in the brown ground-colour being made visible (see Plate I). The 
ground colour of the imperfect black appeared to be brown instead of buff, 
but in the F ?J generation, they threw only imperfect black and buff but no 
brown. It seems therefore that the buff colour was deepened by the action 
of the gene which develops the anthocyanin in the same epidermal cell. The 
present instance resembles that of the palea colour observed in the cross 
“ Hanbun-nento ” x “ Genroku-mochi ” in which the self purple was completely 
linked with the brown ground-colour and the localized purple excluded the 
latter. In both cases, the full development of anthocyanin is in some way 
associated with the brown pigment. 
