IN THE SECOND CHROMOSOME. 



317 



One vestigial (arc) speck male was produced by crossing-over. He 

 must have had the left-hand end only of the Nova Scotia chromo- 

 some, - . He was mated to a black female of stock, 



b p r v g a r s p 



\ TT 7 V d 9 



and two wild-type daughters, r ~ - ? , were tested, in cultures 

 328 and 329. They gave the results shown in table 13. 



TABLE 13. 



These data have been added to those of table 12 in the summary 

 for Cji i, table 14. The corresponding map is shown in the third line 

 of figure 1. 



TABLE 14. C/j r , summary. 



The values obtained from second broods (table 14) run consistently 

 a trifle lower than the corresponding values for first broods. The 

 differences are small in every case; but since all are in the same direc- 

 tion, and since females with neither C// , or C n r show an age change 



