Occurrence of different systems of gametic reduplication. 13 



1. Markings: 



S = striped (or striped blackj'j, s = absence of S, 

 M = inoricaud, m ^ „ „ M, 



N = nonual, n = „ „ N. 



smn denotes, here, the plain coatedness. Linear arrangement in epistatic 

 order of these markings is 



ep 



striped > moricaud ) normal ) plain. 



2. Colours : 



I' = yellow, y = white. 



These represent the colour characters of the cocoon as well as those of 

 blood of the larva, the colour of the former being coincident with that 

 of the latter so far as yellow and white are concerned^). Yellow do- 

 minates over white ^). 



3. Strains: 



Chinese striped, yellow, trimoulting, univoltine; 



„ „ white, „ „ 



„ moricaud, yellow, „ „ 



„ „ white, „ „ 



„ normal, yellow, „ „ 



„ „ white, „ „ 



„ plain, yellow, ,, ,, 



„ „ white, „ „ 



Aojiku. Japanese normal, wliite, tetramoulting, univoltine. 



Hogyoku. „ ., „ „ bivoltine. 



Daihakuryu. „ „ „ „ „ 



Arayahime. ' „ plain, „ „ „ 



Gametic Series in Normal -Yellow Repulsion. 



Fl animals (Ni/nY) produced by the cross between NijN^i/ and nYnY 

 will give three F2 forms in the ratio 2 NY : 1 Ny : 1 nY instead of four 

 in the ordinary pioportion 9 NY : 3 Ny : 3 nY : 1 ny. Such result would 



') This marking should be distinguished from Toyama's "striped" which I prefer 

 to designate as "zebra" according to the previous authors, Toyama himself inclusive. 

 -) Green cocoon-spinner is white (colourless) blooded. 

 ') Dominant whites were not used iu the present work. 



