PLATE 5 



EXPLANATION OF FIGURES 



17 (Culture Y, Line III g, 202d generation, June 6, 1914. To illustrate that 

 essentially the same stage as that shown in figure 14 from Culture Z occurred 

 in another Culture Y in isolated animals. 



18 Culture Y, small tube culture, about 1.37th generation, April 22, 1914. 

 Animals in the climax of endomixis. Alacronucleus partially resolved into de- 

 generating chromatin bodies. Micronucleus after 'reduction.' 



92 



