Responsiveness 75 



part and the reaction of the subordinate or 

 somatic cells is the antecedent of memory. 

 Sensations due to outward contact have to 

 wait for a more complex organization to sepa- 

 rate the route travelled by the outgoing and 

 incoming currents. So long as they moved 

 over the same route in alternation, no outer ob- 

 ject can be distinctly perceived nor can the use 

 of organs determine their growth and devel- 

 opment. Adjustment would be accidental. 



An aggregate of cells therefore indicates 

 conscious action, in that the secondary cells, or 

 segments, respond to the impulse of the mother 

 cell. It also indicates memory since the 

 activity of each part repeats the activity of the 

 other. While one half is active because of an 

 outgoing current in its direction, there is an 

 ingoing current from the other half, each 

 part being directed in its activity by what has 

 taken place in the other. This is the essence 

 of memory the reproduction in a new 

 activity of that which has been done before. 

 In a simple bilateral organism there must 

 always be a memory present to guide each 

 new activity, because the other part has just 



