LOSS OF EYE-PIGMENT IN GAMMARUS. 285 
III.R. Female, Red carrying Albino (Plate 1). 
-Matings :—(1) with either male EK or male F of the same 
brood, (B+A); (6 young, 3 Black, 3 
Albino) ; 
(2) with male G of the same brood, (B+ R-+- 
A); (2 young, 1 Black, 1 Red). 
IV.W. Male, Red carrying Albino (Plate I). 
Matings (1) with female Aa, of the same brood, 
(R+A); 72 young, 54 Red, 18 Albino ; 
(2) with female Z of the same brood, (RA) ; 
154 young, 127 Red, 27 Albino ; 
(3) with a female (from Brood 1 of III.C.), 
(A+B); 56 young, 29 Black, 27 Albino. 
IV.X. Female, Red carrying Albino. 
Matings :—(1) with male J of the same brood, (B+R-+ 
A) ; (12 young, 3 Black, 4 Red, 5 Albino) ; 
(2) with male VI.A.1.e., (B+R-+A); (111 
young, 42 Black, 42 Red, 27 Albino) ; 
(3) with male III.D, (B+ A); (429 young, 
329 Black, 100 Albino). 
IV.Y. Female, Red carrying Albino. 
Matings :—(1) with male L of the same _ brood, 
(B+R-+A); (2 young, | Black, | Red) ; 
(2) with male E of the same_ brood, 
(B+R-+A); (19 young, 10 Black, 5 Red, 
4 Albino) ; 
(3) with a male (Brood 1 of III.B.) ; (A+B) ; 
(16 young, 12 Black, 4 Albino). 
IV.Z. Female, Red carrying Albino. 
Matings :—(1) with male W of the same brood, (R-+ <A) ; 
(154 young, 127 Black, 27 Albino) ; 
(2) with a male (Brood 1 of III.B.), (A+B) : 
(65 young, 31 Black, 34 Albino) (Plate 
TE Rics3): 
IV. Aa. Female, Red carrying Albino. . 
Matings :(1) with male W of the same brood, (R+A) ; 
(72 young, 54 Red, 18 Albino). 
V.K. Male, Red. Constitution not proved. 
V.L. Male, Red carrying Albino, mated with female M ; 8 young, 6 Red, 
2 Albino. 
V.M. Female, Red carrying Albino. 
