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E. J. ALLEN AND E. W. SEXTON. 
8.—Mating of Pure Black with Red carrying the factor jor Albino ; ofispring all 
Black-eyed. 
Both animals from the one brood; the same male (B) as in Fig. 7: the 
female (R+ A) VI.A.1.q. (p. 309, Plate I). 
9.—Mating of Red carrying the factor for Albino with Red carrying the factor for 
Albino ; offspring in the proportion of 3 Red-eyed to | Albino-eyed. 
Both animals from the one brood; the male (R-+A) VI.A.1.n. (p. 309, 
Plate II); the female (R+ A) VI.A.1.q. (also in Figs. 8 and 10). 
10.—Mating of Red carrying the factor for Albino with Pure Red ; offspring all Red- 
eyed. 
Both animals from the one brood; the same female (R-+ A) as in Figs. 8 
and 9; the male (R) VI.A.1.m. (p. 308, Plate I). 
11.— Mating of Red carrying the factor for Albino with Pure Red ; oftspring all Red-eyed. 
Both animals from the one brood; the same male (R) as in Fig. 10; the 
female (R+ A) VI.A.1.p. (p. 309, Plate IT) (also in Fig. 12). 
12.— Mating of Red carrying the factor for Albino with Red carrying the factor for 
Albino ; offspring in the proportion of 3 Red-eyed to 1 Albino-eyed. 
The male (R-+ A) is II.B. (p. 284, Plate II); the female (R-+ A) VI.A.1-p. 
(also in Fig. 11). 
13.— Mating of Black carrying the factor for Albino only with Pure Red ; offspring 
all Black-eyed. 
The female (B-- A) VI.C.1.k. (p. 298, Plate I1); the male R from the Pure 
Red Stock. 
14.— Mating of Black carrying the factors for Red and Albino with Black carrying the 
factor for Albino only ; offspring in the proportion of 3 Black-eyed to 1 Albino- 
eyed. 
Both animals from the one brood ; the male (B+ R-} A) VI.C.1.b. (p. 297, 
Plate IL); the female (B+ A) VI.C.1.k. was used in the previous figure. 
15.—Mating of Black carrying the factors for Red and Albino with Black carrying the 
factors for Red and Albino ; offspring in the proportion of 9 Black-eyed to 3 
ted-eyed to 4 Albino-eyed. 
Both animals from the one brood; the male (B-+ R-+ A) was used in the 
previous figure; the female (B+ R-+ A) VI.C.1.f. (p. 298, Plate II). 
16.— Mating of Albino carrying the factor for Black only with Pure Red ; offspring all 
Black-eyed. 
The male (A+ B) VI.A.1.r.(p. 318, Plate I1); the female (R) from the Pure 
Xed Stock. 
17.—Mating of Albino carrying the factor for Black only with Red No-white ; off- 
spring all normal Black-eyed. 
The same male (A+B) from the previous experiment—Fig. 16; the female 
(RN) VII.C.3.a. (p. 333) is an F, from the Family VII figured on Plate V. 
18.— Mating of Albino carrying the factor for Red only with Red carrying the factor 
for Albino ; half the offspring Red-eyed and half Albino-eyed. 
Both animals from the one brood; the male (R+A) VI.B.2.a. (p. 313, 
Plate IT); the female (A+ R) VI.B.2.u. (p. 322, Plate IT). 
Plate V. 
1.—The origin of K. Family, in which the No-White Mutation first occurred. 
Parent Generation, Pure Black mated with Pure Red. IF, Generation, 
24 survivors, all Black carrying the factor for Red. The No-whites appeared 
in some of the broods of the F, generation. One of these broods is figured 
here, with the offspring (I’,) resulting from the inter-mating in the brocd ; 
some of the F, generation are also shown. 
. 
