Fie. 
Fie. 
Fie. 
Fic. 
Fic. 
Fic. 
Fie. 
Fic. 
Fie. 
Fic. 
LOSS OF EYE-PIGMENT IN GAMMARUS. 519)1 
3.— Mating of Albino carrying the factor for Black with Red carrying the factor for 
Albino ; half the offspring Black-eyed, half Albino-eyed. 
The male (A-++ B) is from the same brood as the male of Fig. 2 (pp. 279 and 
286), the female (R-+-A) IV.Z. (p. 285, Plate I). 
4.— Mating of Albino carrying the factor for Red with Pure Red ; offspring all Red- 
eyed. 
The male (R)-and the female (A+R) are both from a brood of the female 
1.G. of Cross A (p. 286). 
5.— Mating of Albino carrying the factor for Red with Red carrying the factor for 
Albino ; half the offspring Red-eyed, and half Albino-eyed. 
Both the male (R-+ A) and the female (A+R) are from the same brood as 
the pair of Fig. 4 (p. 286). : 
+. 6.— Mating of Albino carrying the factors for Black and Red with Red No-white ; 
half the offspring, Black-eyed, carrying the factors for Red, Albino and No- 
white, and half Red-eyed, carrying the factors for Albino and No-white. 
The male (A+ B+-R) is II.D.1.j. on Plate II (p. 333); the female is a Red 
no-white from Family K (Plate V, Fig. 1). 
Some of this brood came to maturity, but died before their constitution 
could be proved ; their sex is shown in the diagram, but no distinctive letters 
have been given them. 
Plate IV. 
1.—Mating of Black carrying the factors for Red and Albino with Pure Red ; halt the 
offspring Black-eyed, half Red-eyed. 
The female (B+ R-+ A) (also in Figs. 2 and 3) is VI.A.1.1L (p. 293, Plate II); 
the male (R) came from the Pure Red Stock. 
2.— Mating of Black carrying the factors for Red and Albino with Black carrying the 
factor for Red only ; offspring in the proportion of 3 Black-eyed to 1 Red-eyed. 
Both animals from the one brood ; the same female (B+ R-+ A) as in Fig. 1 
mated with the male (B+ R) VI.A.1.a. (p. 291, Plate I1). 
3.—Mating of Black carrying the factors for Red and Albino with Red carrying the 
factor for Albino ; offspring should consist of Black-eyed, Red-eyed and Albino- 
eyed animals. 
The same female (B+ R-+ A) as in the two previous figures mated with the 
male (R+-A) VI.C.1.0. (p. 310, Plate I). 
4.— Mating of Black carrying the factor for Red only with Pure Red ; half the offspring 
Black-eyed, and half Red-eyed. 
The same male (B+ R) asin Fig. 2, mated with a female (R) from the Pure 
Red Stock. 
5.—Mating of Black carrying the factor for Red only with Black carrying the factors 
for Red and Albino ; offspring in the proportion of 3 Black-eyed to 1 Red- 
eyed. 
The same male (B+ R) as in Figs. 2 and 4, mated with the female (B+ R-+- A) 
VI.C.1.d. (p. 297, Plate IT). 
6.—Mating of Black carrying the factors for Red and Albino with Red carrying the 
factor for Albino ; offspring should consist of Black-eyed, Red-eyed and 
Albino-eyed animals. 
Both animals from the one brood; the same female (B-+-R-+<A) as in 
Fig. 5; the male (R-+ A) as in Fig. 3. 
7.— Mating of Pure Black with Pure Red ; offspring all Black-eyed. 
The male (B) VI.A.1-c. (p. 292, Plate IT); the female (R) from the Pure Red 
Stock. 
