-76- 



drawn from Sole'w table. 



This return of the anterior to'*ard its original direoticn 

 ia an example of the tendency which we lave noticed in connec- 

 tion with the deviation reaction ( p iff ) for the coordinated 

 impulse to return to its original direction, even after having 

 been actively oriented in aoue other direction* 



le (1913) has shown very conclusively that the impulse 

 to locoraota, in the starfish tends Iks to maintain the same 

 general direction, from trial to trial. (Between each trial the 

 animal was held inverted by the disk until the raya dropped and 

 then "started" on the bottom of an aquarium in a non-directive 

 chamber.). Hie tendency to lK*ep in the sans direction was of 

 course only general, aa there wag also a rotation of the anterior 

 toward the rifc-Ut or toward the left, and certain aberrant 



deviations, of from one half to two and a half inter-radii 



i#u/n 



Incurring quite frequently. In B eoanafrting up these deviations 



Lu&) 



from the table opposite It it was found that they amounted 

 to a sum total of 217 intor-rudii in 499 trials* 'Ihis amounts to 

 a shift of anterior of .43 inter-radii per trial which is quite 

 comparable quantitatively with the figures (,38 ,CO, .67/ inter- 

 radii ^obtained from the status of the direction of the coordinated 

 impulse ttiroughout the righting reaction* 



Z conclude therefore that righting it an aspect of locomotion* 



