232 GENETIC STUDIES ON THE SILKWORM 
the dominants in number ; in others, the former far exceeded the latter. 
3) Extraordinary ratios of 3- and 4-moulters appeared as results of the 
mating of 3-moulters and 3-moulters. 
4) The two forms (3- and 4-moulters) appeared nearly in equal numbers 
as a result of crossing 4-moulter x 4-moulter. 
In the following lines are given some examples of such abnormal pro- 
met with in 
my expei 
iments. 
3-moulters x 
3-moulters. 
3-m. 
4 — m. 
Ratio 
O 0 c - 1 '1 1 
y/ 
70 
T A ' I 
O 'y z — i f t a 
V ' — _ 1 4 
3 J 
1.5 . 1 
( ) "•Z.-T.'lA 
v/ -3 3 '4 
117 
80 
II • I 
D ■?f>- \ ' r 1 
V / — 1 1 il. 
I 26 
1 0 1 
1 . 1 .-, 
w j4 - 1 4 
I 2 ? 
1 1 J 
11 : 1 
O /in' 1 a 
I 2^ 
I 
* 3 
1 .1 
^ 1 4 — 1 1 1 4 
A ' 
43 
AO 
I . 1 I I 
N 1 1 ' 1 a 
20 
1 - 
I : i.S 
iN 1 3 3 1 4 
85 
86 
1 " 1 
r / J '4 
3/ 
51 
T • I A 
P 7 -— 1 ' 1 1 
/ 3 1 1 4 
166 
38 
A A ' 1 
4.4 . 1 
P;5-2'i 4 
44 
95 
I : 2.2 
P8i'i 4 
53 
45 
1.3 : 1 
P84-i'i4 
57 
10 
5.7 : 1 
P 84-2' 1 4 
106 
9 l 
1.2 : 1 
-"-333 1 3 
22 1 
43 
5.1 : 1 
A 62l'l5 
197 
33 
6 : 1 
A 764' 1 5 
*39 
158 
1 : I.I 
A 7 2 5 'i5 
1 2 
59 
1 : 4.9 
A 726' 1 5 
4 
4i 
1 : 10 
3-moulter x 
4-moulter £ J . 
N6'i4 
295 
76 
3-9 : ' 
