REGULATION OF REACTIONS 



295 



TABLE IX 



Showing reactions of two specimens F and G, from shallow water. 



Legend same as for Table VIII. See footnote. 



I 



o 



3 

 4 



5 

 6 



7 

 8 



9 



lO 



II 



12 



13 



14 



15 

 i6 



17 



i8 



19 



20 



lO A.M. 

 22° 



40 



30 

 30 



60 



45 

 100 



300 

 40 



30 

 180 



43 

 180 



75 



75 

 470 



50 

 60 



150 



G 



360 

 60 



180 

 60 



50 



50 

 90 



60 



35 

 120 



300 



60 



90 



105 

 90 



130 



150 



150 

 225 



90 



2 P.M. 

 23° 



15 

 10 



12 

 10 

 18 



15 

 12 



13 



15 



12 



45 



75 

 20 



20 



12 



15 

 II 

 18 



20 



30 



45 



30 



45 



50 



35 

 80 



100 

 40 



no 

 90 



15 



90 

 90 



105 

 80 



85 



45 



The fact that there is no " definite law in relational 

 sequence " in the reactions of Hydroides, especially the 

 fact that the time that a given specimen remains in the 

 tube varies so much without any observable regularity or 

 relation with environmental changes, has led Hargitt to 

 conclude that behavior of organisms cannot be explained 

 by the application of purely physical principles and to 

 sympathize " with a tendency to postulate the presence of 

 certain psychic factors." 



However one may regard Hargitt's conclusion, his results 

 seem to show clearly that the immediate environment 

 at any given time will not account for the reactions of 

 Hydroides at that time, that they are dependent upon 



