404 



RUTH J. STOCKING 



TABLE 3— Continued 



appearance of the character in all their lines. Race 39b (fig. 7) 

 divided seven times in eight days, forming only normal indi- 

 viduals until December 11, when six of the eight individuals 

 present were very much misshapen. After this date only abnor- 

 mals were produced by this race, which died out on December 

 27. There was a very large proportion of double forms among 

 the individuals of this race, eleven of the twenty-five abnormals 

 produced being of this character. 



Race 40b (fig. 8) divided regularly to form only normals up 

 to December 11, when three out of the five then present were 

 abnormal. The two normals died out and the race was carried 

 on through the abnormal individuals. These produced only 

 abnormal progeny and the race died out on December 19. 



Race C, described on pages 414 to 420, is a typical long-lived 

 race of this group. 



3. As the third group of abnormal races we may distinguish 

 those which did not become entirely normal, but from which 

 normal races were obtained by continued selection. This group 

 will be dealt with in our section on selection. 



