96 



r.ERT BONNIRR 



from the -Y extended from a point l)et\veen eosin and echinus to a 

 point between vermiHon and garnet. The percentaf^e of exceptions 

 was 9,91 i 0,06 in a total of 2907. 



The ancestry of culture 674 (tal)le 15) is the following: An eosin 

 daughter from 588 (table 1) ^vas crossed to a scute eosin cut vermilion 

 garnet forked male from 575 (table 10) in the culture-bottle 636 

 (table 3) and one of her eosin daughters was the mother of 674 (table 

 15). She herself was mated to a yellow male and the ordinary pro- 

 cedure was followed for some generations. The part here common 



TABLE 15. 

 Offspring of a rcguhir eosin non-disjiinctional daughter from 636 table 3 

 and of her exceptional female descendents when mated to various males. 



Percentage of exceptions 8,02 i 0,8o. 



to the A': s and originating from X has its left limit between scute and 

 eosin and its_^ right one between echinus and cut. The output was 

 8,02 + 0,80 percent of exceptions in a total of 1159. 



Finally a scute eosin female from 531 (table 9) was mated to a 

 scute eosin vermilion garnet forked male from 544 (table 10) consti- 

 tuting culture 639 (table 9). A scute eosin forked daughter from this 

 culture was then mated to yellow males and the scheme was followed 

 of taking exceptional daughters and crossing them to various males for 

 some generations (table 16). The percentage here is 9,5i db 0,90 in a 

 total of 1062. The part of the X which is common to the sex-chromo- 

 somes has one limit between scute and eosin and the other between 

 cut and vermilion. 



Before I finish the enumeration of the different crosses of the ex- 

 periment it must be remembered that in the crosses of tables 5, 6 and 



