6l2 



H. S. Jennings 



mal free individual, while the other product remained attached 

 to the left half. The latter underwent a partial, irregular division. 

 Thus the result is to produce an irregular structure consisting of 

 three fused individuals (Fig. 15, c). 



Fig. 14 Diagram of the history of the race derived from the irregular individual aj. In the third and 

 fourth generations double and triple monsters appeared, with several mouths (m) and multiple proto- 

 plasmic circuits. Two such circuits are shown by arrows at 5. 



