-10- 



attaohing reflex la the one t/iut contact stimulation alioita. 



It -would seem, then, from the difference in behavior of 

 tube feet taken from animals in different physiological atatea that 

 this etato of specialized irritability ia a condition of the ambu- 

 lacral Us^ and ^hilo angendarsd, most probably, by influences pro- 

 ceeding fro^a the radial nervoua ayatam, is not dependent upon that 

 aystea for a rather limited continuance, 



Attaching bjc, only a, P-^ rt g^ ifce aabuliorapl digl: t 

 The : .tt-x9hing raflex does not, naoessarily involve all of 

 the ambul-5orl disk, rh.e and of a gnall rod was placed on various 

 partn of tii3 lo'tar surface of a larsa actively attatiiiing pediol 

 The part in cont-act -7ith the end of t>io rod attached with aroat force, 

 auoh thit :in atteispt to withdraw the rod result M in pulling a portion 

 of th;j disk out of shape. A fina hook *a laid flat against the 



of tub3 r -j thit 



atroaiant ^*5.9 hoo.V-ahaj 



* 



iak in contact *.ith the in- 

 attached to the hook quite 



strongly* In fact, any part of varioua di*kf ^faa found to attach 

 even to the point of a nesdls, -shan tM was applied gently enough. 

 Thea exparimanta were repeated upon Isolated tube foot preparat-iona 

 vith. the same result. 



Tha disk as an attacliing laeehaniara, than, ioea not act as 

 a whole (Preyer 1086), but rather the inaupping oooura to'vard the 

 center of any properly stimulated ai-ea. 



Re\ea a ing and^ vitSidraval -*s a result of 8 t L.iiaul xticm o/ 

 p,ide p^* colxam 



Rele&ae of attaclunant and withdrawal are Vo reaponeee 



