238 
GENETIC STUDIES ON THE SILKWORM 
the body. 
This curious example was found among a lot of pure breed of the Japanese 
race O-aivo noted for its large size. To my regret, the larva was lost 
before the sex could be ascertained and either a photograph or a sketch had 
been taken. 
Mosaic 7. A light normal-patterned larva, yellow-footed. Right half 
of body normal opaque, lefc transparent, some intermingling of the charac- 
ters. Female on both sides. 
Mosaic 8. A green-cocooner with lightest normal pattern, of the 
Japanese breed Walako. No abnormality was recognized on the back, but the 
skin of the ventral side was marked in the left half with a number of trans- 
parent patches of irregular outlines. The mosaic is confined to segments 
I-VIII, the hinder ones remaining normal. Female. 
Mosaic 9. On the dorsal surface, there are present in the left half, a 
number of detached transparent patches which become more extensive in the 
posterior segments. The caudal horn pointed toward thj lefc instead 
backwards. Ventral side opaque white and symmetrical. Female. 
Mosaic 10. Multilunar-zebra-normal, yellow. The right side was 
entirely free from multilunar spots, which occurred on the left side in II, III, 
V, VII and VIII segments. No abnormality regarding Z and P(J patterns. 
Sex unknown. 
Mosaic 11 (Fig. 73). The larva is practically moricaud-quail, but the 
moricaud character is absent here and there in the left of the body, leaving 
main' irregularly shaped white patches. The gonads were not examined. 
Some instances of mosaic and gynandromorphous individuals are found 
in the literature on silkworms. Toyama (1906a), whose descriptions on the 
subject are best known, had two examples, both found among the F 1 offspring 
of the cross zebra 9 x normal In both the right side was zebra and 
female and the left normal and male. 
Ikeda (1908) mentions two mosaics, one of which had normal right and 
moricaud left, whereas the other was a mosaic gynandromorph, i. e. the right 
