LOSS OF EYE-PIGMENT IN GAMMARUS. 311 
VI.C.1.p. Male, Red carrying Albino. ; 
Matings :—(1) with female h of the same brood, (B-+-R) ; 
(40 young, 16 Black, 24 Red) ; 
(2) with female f of the same brood, (B+ R-+- 
A); (78 young, 32 Black, 23 Red, 23 
Albino) ; 
(3) with female VI.A.3.k. (B+ A) ; (38 young, 
27 Black, 11 Albino). 
VI.C.2.m. Male, Red carrying Albino. 
Matings :—(1) with female n of the same brood, (R--A) ; 
5 young, 2 Red, 3 Albino. 
VI.C.2.n. Female, Red carrying Albino. 
Matings :—(1) with male m of the same brood ; (5 young, 
2 Red, 3 Albino) ; 
(2) eaten by mate. 
VI.C.2.0. Female, constitution unknown. 
Matings :—(1) with male m of the same brood (R--A) ; 
eleven batches of eggs were laid, but no 
young were hatched ; female died. 
VI.C.3.m. Male, Red carrying Albino. 
Matings :—(1) with female o of the same brood, (Pure 
Red) ; 48 young, all Red ; 
(2) with female r of the same brood, (A+R) ; 
381 young, 181 Red, 200 Albino. 
VI.C.3.n. Male, Red. Albinism not known. 
Matings :—(1) with female d of the same brood, (B+) ; 
(16 young, 13 Black, 3 Red). 
These young all died immature, and it was therefore not possible 
to test the brood for albinism. 
VI.C.3.0. Female, Pure Red. 
Matings :—(1) with male m of the same brood, (R+A) ; 
(48 young, all Red) ; 
(2) with male q of the same brood, (A+R) ; 
36 young, all Red. 
VI.B.1.a. Male, Pure Red. 
Matings :—(1) with female f of the same brood, (R-+-<A) ; 
29 young, all Red ; 
(2) with female j of the same brood, (Pure 
Red) ; 37 young, all Red ; 
(3), (4) with a Black female and an Albino 
female, both of which it ate. 
