Heredity in Protozoa 



591 



Fig. 3 Transformations in the race a during the first four generations. The anterior end is to the 

 right, a, the original crooked individual (first generation), a', a-, the anterior and posterior products 

 of its fission. At 5 the individual a} has grown and is dividing, giving the individual 7 (anterior) and 

 2 (posterior). The arrows show the origin and transformations of each individual. For details, see 

 text. 



