LOSS OF EYE-PIGMENT IN GAMMARUS. o2] 
Matings :—(4) with female VI.B.3.e. (Pure Red) 
young, all Red ; 
(5) with female VI.C.3.¢. (B-+-R) ; 28 young, 
IS eBiaekeeto ded: 60 
One other reached maturity, a female, which died before its con- 
stitution could be tested. 
VI.C.3.p. Male, Albino carrying Red only. 
Matings :—(1) with female r of the same brood, (A+R) 
11 young, all Albino ; 
(2) with female j of the same brood, (B+ A); 
(31 young, 14 Black, 17 Albino) ; 
(3) with female VINE:2 j= (Pure Red) - 17 
young, all Red). 
VI.C.3.q. Male, Albino carrying Red only. 
Matings :—(1) with female u of the same brood, (A-- B+ 
R); 11 young, all Albino ; 
(2) with Albino female v of the same brood 
(constitution unknown); 30 young, all 
Albino ; 
(3) with female t of the same brood, (A) 
14 young, all Albino ; 
(4) with female o of the same brood, (Pure 
Red) ; (36 young, all Red). 
VI.C.3.r. Female, Albino carrying Red only. 
Matings :—(1) with male p of the same brood (A+R) 
(11 young, all Albino) ; 
(2) with male m of the same brood, (R+A) 
381 young, 181 Red, 200 Albino. 
VI.C.3.s. Female, Albino carrying Red only. 
Matings :—(1) with a male descended from the same 
stock as R.1. (see male IT.B. p. 284) (Pure 
Red) ; 5 young, all Red. 
VI.C.3.t. Female, Albino. Constitution unknown. 
Matings :—(1) with male q of the same brood, (A+R) 
(14 young, all Albino) ; 
(2) with Red male VI.B.3.d. ; eaten. 
VI.C.3.u. Female, Albino carrying Black and Red. 
Matings :—(1) with male q of the same brood (A+R) 
(11 young, all Albino) ; 
(2) with male VI.B.3.a. (R+A); 47 young, 
15 Black, 13 Red, 19 Albino. 
NEW SERIES.—VOL, XI. NO, 3, DECEMBER, 1917, 
5 “a 
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