26 



LEWIS R. GARY 

 DISCUSSION 



The foregoing data seem to show conclusively that there is a 

 clearly marked influence of the sense organs upon the rate of 

 regeneration in Cassiopea. There is no evidence, however, that 



II 



Fig. 11 Curves to show the comparative rates of regeneration of the halves 

 of 40 disks, on one-half the sense organs remain, while the subumbrella muscles 

 of the other half are activated by a circuit wave of contraction. The upper 

 (solid) line shows the regeneration of the half disks with sense organs, the lower 

 (broken) line the regeneration of the activated half disks. The divisions along 

 the ordinate represent the amount of regeneration in millimeters. Those along 

 the abscissa the time of regeneration in days. 



the presence of this influence is necessary for the formationof 

 normal structures in regeneration as Herbst ('96 and '99) concluded 

 from his experiments on decapods; or as maintained by several 

 of the earlier workers upon regeneration in platodes, and by 



