INHERITANCE IN ABNORMALITIES 



395 



nected with the fact that the former culture consisted of wild 

 individuals, probably of diverse stocks, while the latter consisted 

 of members of a single clone. This matter will be taken up 

 later. 



Fig. 1 Nine of the individuals of Experiment 1 which never divided, show- 

 ing the diversity of form and size among this class. In this figure anxl in figures 

 2, 3, and 4, the animals were all drawn by means of the camera lucida, and are 

 all to the same scale. (X 100) 



As a rule there appeared to be a tendency for these lai^ 

 individuals to gradually decrease in size (as shown by the meas- 

 urements above given). Figures 2, 3, and 4 show the changes 

 in form and size in certain cases. The forms were frequently 

 nearly normal; sometimes very abnormal, as the figures show. 

 These individuals that never divided were usually black and 

 granular, and often changed shape when transferred to fresh 

 culture fluid, becoming swollen at the anterior end; 'they later 

 resumed their original form. A cytological study of these ani- 

 mals might be of interest in connection with the 'Kern-Plasm 

 Relation' theory, and with the mechanics of division. Such 



