LOSS OF EYE-PIGMENT IN GAMMARUS. 331 
Similarly if we cross an albino carrying black with a red no-white, we 
should get all black-eyed offspring, the animals having the same constitu- 
tion as the above, viz. black with the white normal, carrying red, albino 
and no-white. 
If we cross an albino carrying red with a red no-white, we should get 
all red-eyed offspring with the white normal, but carrying albino and 
no-white. 
For the next generation, if we mate together two of the black hybrids 
we should get :— 
Ww CoBRoeWwCeBR 
Black with the white normal, carrying red, albino and no-white. 
The gametes are (male and female being the same) :— 
VEC Baa Wee RaowW cB. oW ek, wCB, wR, webe wek 
Zygotes :— 
WCBIWCR: We B|Wc Riw CB lw CRiwe B/JweR 
W CB | WCBIW CB | ‘NE CG B WCBiIWCB|WCB|WCB 
WCBIWCR\WcB!|WcRiwCBiwCRiwe BiwcR 
WC R IWCRIWCR | Wi CRIWCR|WCRIWCR|WCR 
WCBIWCR!|Wc B|Wce Rw CB lw CRiwe Blwe R 
A c B i'We Bi Wc B We B| Wc B|Wc B| Wc B| We B 
WCBIWCR Wc B\WcR wCBlwCRiweBwcR 
We R|We R| We R| We. R| We R| We Ri Wo R| WeR 
WCBIWCR WcB|WcRiw CBlwCRiwcBilweR 
w CBiw CB\w CBiw CBjiw CB|w CB\|w CBiwCB 
| | No- No- No- | No- 
a | ee white white white | white 
WCB | WCR|\WeB|We Riw CBiw CR|weBiw ec BR 
w CR jw C Riw CR|/w CRiIw CR\w CR\|w CRiwCR 
| | No- No- No- No- 
ail | white white white | white 
WCB|/WCR WeB|WeRlw CB wCRweBwcR 
wc Biwe Biw cBiw ce Bilw ¢ B\.w cB w cB) w eB 
| Albino Albino 
No- No- No- No- 
white white white’ white 
WCB WCR WeBiWe Riw CBiw CR:weBiweR 
weRi|weRiwecR|weRJweoR|weRiweRiweR 
| | Albino Albino 
No- No- No- No- 
white white white’ white 
