LOSS 
OF EYE-PIGMENT IN GAMMARUS. 343 
Albino, offspring all the usual-eyed Albino in appearance, in agreement 
with theory. 
Number of young, Albino-eyed. 
A+(?)xA+(?) 1157 
A+RxA+R 22 
A+RxA-+(?) 330 
A+RxA+B+R 103 
A+RxAN 126 
+(?)(halfno-white) x AN 271 
Totaly 2212. 
2. Matings giving normal-eyed offspring of two colours in the proportion 
oy al’. 
Black. 
B+RxB+R 
B+RxB+R+A 
B+RxA+B+R 
B+-RxA(?) 
B+AxB+A 
B+AxB+R+A 
B+AxR+A 
Red. 
R+AxR-+A 
Number of young. 
Black-eyed. 
Experiment 735 
Theory 738 
Experiment 300 
Theory 292 
Experiment 7 
Theory [i 
Experiment 13 
Theory 15 
Black-eyed. 
Experiment 468 
Theory 468 
Experiment 144 
Theory 153 
Experiment 481 
Theory 480 
Red-eyed, 
Experiment 1408 
Theory 1408 
Red-eyed. 
249 
246 
90 
97 
2 
2 
( 
5 Lotal 1403. 
Albino-eyed. 
156 
156 
59 
ol 
158 
160 Total, 1466. 
Albino-eyed. 
471 
470 Total, 1879. 
3. Matings giving normal-eyed offspring of two colours in the proportion 
fesel 
Black. 
B+RxR 
B+RxR+A 
B+R»xRN 
B+RxA+R 
Number of young. 
Black-eyed. 
Experiment 403 
Theory 406 
Experiment 44 
Theory 46 
Experiment — 50 
Theory 53 
Experiment 71 
Theory 83 
Red-eyed. 
410 
406 
48 
46 
D7 
53 
95 
83 
