A. H. Trow 



This case may be represented diagrammatically ; thus 



317 



inn Abe 



«AbC 



JiaBc 



abC 



iBC 



Since n and m are each greater than one, it may be shewn that 



1 + nni . 



whether n is equal to, greater than or less than 



m, 



IS greater 



than one, and therefore that the type of reduplication between B and 

 C is of the nature of a coupling. We have therefore established the 

 rule that reduplications between A and B and between A and C 

 whether of the form of couplings or of repulsions, give rise to a 

 secondary reduplication between B and C of the form of a coupling. 



We may now consider the case in which the types of reduplication 

 between A and B and between A and C belong to the series w : 1 : 1 : ?i 

 and \ : m : m : 1 respectively. The gametic series in this case will be 



nABC + nniABc + AbC + ?reAbc + ?MaBC + aBc + «?«abC + na.bc, 



and the reduplication between B and C will be necessarily of the form 



BC : Be : bC : be :: n + m : nm + 1:1 + nin : m + n, 



