Pycnopodia 2.06 



3* This is no expression of the relative attaching 



ability of these animals when not in the locoiaotor state, 

 h. Strength of the step reflex (pulling ability) 



1. Pulling ability in Pi skater ooraoeus 



2. Pulling ability in Ast 3rina.Miniata 



1. On a solid substrate with and without additional 

 weight on its dorsal side. 



2. On sand with and without load 



3* Pulling ability in Pyonopodia helianthoidas 



1. On said substrate with and without load 



2. on sand with and without load. 



VI. Coordination of the tube fast. 

 1 Preliminary description 



2. Coordination in the tube feet of the rigid starfish 



a. Retraction 



b. Extension 



c. Nervous mechanism 



3. Coordination in the gills 



a. Ciliary currents in gills. 



4. Coordination that involves some orientation of the tube feet. 



a. Coordination to attached tube foot and step reflex. 



5. Coordination to passive movements of tube feet. 



a* After twisting tube foot. 

 6* Coordination of the tube feet in active starfish. 



4. Tendency of each arm to migrate in its own direction. 



VII. Formation of the unified impulse* 



1. General statement of the mechanism of the positive response 



2. General description of the negative response. 



3. Detailed description of positive and negative responses in 

 Pyonopodia. 



