Heredity of Acquired Characters 



Figure 16. Reproduction for several generations of a Paramecium 

 bearing a large projection on its aboral surface. At each division only 

 one individual receives the projection; all other offspring and descend- 

 ants are normal. After Jennings, 1908. 



Figure 17. Reproduction in a Paramecium bearing a small abnormal 

 projection near the posterior end. All offspring but one are normal 

 from the beginning, and even the abnormal individual becomes normal 

 after two divisions. After Jennings, 1908. 



