360 Maternal Inheritance and Mendelism 



Resume: 



B = light and dark blue batches ; / = intermediate ; N = normal ; W= divoltine white ; 

 M=mixei batch consisting of divoltine white and univoltine blue-coloured eggs. 



Parent eggs B 



Eggs of the first generation N{20) 



I j 



second generation { N (204) + 1 (165) + B (47) } 

 third „ W{251) 



fourth „ B(9){B (49) + N (27)} N (6) 



fifth „ {B(28) + Pr(306)} 



„ sixth „ all B (445) 



Series 3. The Whitish-Grey egged Variant (Fig. 4). 



This variant from the normal egged breed is characterized by the 

 peculiar structure of the shell. As is well known, the shell of normal 

 breeds is elastic and translucent, its surface being smooth. That of the 

 variant, on the contrary, is rather brittle and opaque, and is milky white 

 in colour, in consequence of which the colour of the serosa can barely 

 be seen through the shell and thus a peculiar whitish grey colour is 

 produced. The surface of the shell is not smooth as in the normal 

 shell, but begins to become irregularly corrugated as soon as the 

 ventral plate is formed. There is no depression in the middle, which is 

 a common characteristic of the egg laid by normal breeds. 



In the spring of 1909, we obtained two batches of grey eggs, one 

 being derived from the univoltine white reared in the district of 

 Hyogoken, and the other which came from Fuktishimanken is derived 

 from the normal divoltine white, " Aobiki." They were reared separately 

 and each of them gave both normal and grey batches, that is to say, the 

 former deposited one grey and one normal batch (Table III) and the 

 latter 15 normals and 20 greys (Table II); no mixed batches were 

 produced in these cases. (See Tables II and III.) 



In the second generation (summer brood of 1909), moths derived 

 from both normal and grey eggs paired inter se, yielded again, with no 



