3, :3esoripti.on of various other correlated movement* of 

 the tube feet and arms* 



* 



4 Description of th formation of the coordinated irapuliie 

 then the tuba fset ara free of the substrate* 



5* Correlation of thaw Movements with the righting reaction, 

 a* Analyses of Jennings seven types of righting reactions. 



6* Description of th righting reaction as it occurs vhan 

 the tube feet are prevented attaching by inverting the 

 animal on sand* 



XIX Interpretation of the righting reaction as a phase of loco* 

 motion* 



1* 'Yidenae from the movements of the tube feat and arms* 



:*videnae from the fact that stimulation of the dorsal 



rnyodenaal sheath is not mn essential faotor in the right- 

 ing reaction, 



Z. .Tidenoe from tlie pereistsnoe of the 'unified impulse* 

 in the oam direction, to <* degree quantitatively compar- 

 able to its persistence in ordinary loccuaotion 





