4* Orientation as a result of stimulating the dermal nei 

 net, or a general stimulation of all the tube feet* 



6* The significance of the negative behavior of the isolated 



rays* 

 VIII* Behavior of the starfish when under the influence of the 



unified impulse 



1* Positive reaction to contact and other stimuli* 

 3* Negative reaction to contact and other stimuli 

 3. Physical as distinguished from physiological orientation* 

 a. Direct orientation of the tube feet of the leading ray 



from unilateral stimulation, 

 b* Acceleration cf the lateral rays by stimulation or fy 



mechanical factors* 



o* Retardation of the lateral rays by stimulation or -^ 

 mechanical factors* 



XX* General oonsiderationof coordination* 

 1* 



General consideration of the factors involved in governing 



the direction of locomotion in the starfish and their 

 very delicately inter -related balance* 

 2* Theories of the mechanism of coordination* 

 3* Orientation of retracted tube feet and the independence 

 of the mechanism of orientation, and that of withdrawal 

 or stepping* 



X* The breaking up of the coordinated impulse into areas in whio h 

 the tube feet are oriented in different directions* 

 1. The adaptiveness of this response as illustrated in 

 a* 'Ihe righting reaction 

 b* The teviation reaction 



o* 'he locomotor starfish with curved lateral arm* 

 2* Physiological explanation not to be found in fcypothetioal 

 "Complex coordination center". 



