Fig. 5. (Upper figure). — Experiment 48, illustrating Type III. in a case 

 where tlie period of irregularity is influenced, apparently, by the preceding 

 asymmetry. It should be observed that the reactions were taken rapidly 

 during the period of asymmetry and irregularity. 



Fig. 6. (Lower figui'e). — Experiment 162. The embryo fx'om which this 

 record was made was, on the whole, the most irregular specimen of my 

 series. Still, after the period of asymmetry there is a marked general 

 tendency to move the head away from the side touched. 



For further data see Table, p. 02. 



