K. TOYAMA 



399 



which gave all F^ R batches will remain true to parents in the succeeding 

 generations, while another lineage which gave D and R batches in F^^ 

 will again disintegrate into its components in the same way as we have 

 already described in previous pages. The order of their inheritance 

 will bo as follows : 



(■i N X i grey variant No. '24.) 



(2) (1) 



Zygotic coniiJosition Zygotic composition 



F] eggs ... R (RR) R(DR + RR) 



Fi eggs 



F^ eggs 



Fj eggs 



I 



I 

 R) 



(D 



I 



R 



I I I 

 (I) + " " 



(D + R) 



R) 



I 



R 



R) (D + R) 



Here both actual and theoretical results, as in the former cases, agree 

 perfectly in every respect. 



Similar phenomena of maternal inheritance had already been 

 observed in certain seed-characteristics of wheat by Bifl'en, of peas and 

 maize by Bateson, Correns, Lock, Tschermak, etc. For instance, certain 

 indented peas reciprocally crossed with the round gave the following 

 results : 



( ? Indent x S Round) ( ? Round x d Indent) 



Fi seeds ... Indent Round 



F.^ seeds ... Indent Indent 



F3 seeds ... (Indent + Eound) (Indent + Round) 



In certain oases, however, strict segregation took place or an inter- 

 mediate form was produced in F.,. It was, moreover, mentioned that in 

 certain varieties those characteristics behaved quite normally in in- 

 heritance, namely, Fi seeds are all indents which in F., segregate into 

 three indents to one round. 



Hence we are led to say that certain characteristics of the eggs of 

 animals and of the seeds of plants behave in inheritance in a similar 

 way. 



We shall discuss in our next paper the appearance of intermediate 

 or mixed batches in certain line- or cross-breedings, a fact which seems 

 to be inconsistent with maternal inheritance. We are at present 

 collating the facts gathered from certain experiments which we have 

 just concluded, and from the trend of our results up to the present, we 



