THE AMERICAN NATURALIST [Vol. XLVIII 



TABLE X 



F, Counts from the Cross Vermilion $ X Beaded 

 V.Bd.9 V.Bd.d 1 V.N. 9 V.N.cT Red Bd. 9 R.Bd.c? R.N. < 



Bd.V : N.V.= 65 : 170. 

 Bd.Red : N.Red = 55 : 1 

 Bd.Total : N.Total = 121 



taiuj: XI 



I'„i.T,,t:,i : \. ! • • 



(291.C 



caused by a dominant sex-linked 

 factor lethal when homozygous. 

 (See page 754.) It will be dis- 

 cussed under the name "Perfect 

 Notched" and its peculiarities 

 described in the section on "Mu- 

 tation in Beaded Stock." 



(c) Linkage to Second Chromo- 

 some Genes 



ns given, it seems 

 re is in the group 



lintlicpnxlnrtionof Beaded 

 . We shall later bring for- 



ma de with flie 



