CHARLES ZELENY. 



10 



i . 



12 



13 14 15 = 16 17 18 19 



6 



I 5 



rt 



T3 



D 4- 



S 3 



m 



i-n 



ffi-I 



i-n 



urn 

 i-n 



I-E 



i-n 



7 9 10 ii 12 13 14 15 16 17 18 19 



Disk diameters in millimeters > 



FIG. i. The abscissae, represent the disk diameters in millimeters and the ordinates 

 the regenerated arm lengths, also in millimeters. The unbroken line gives the aver- 

 age of Series I. -II. (the specimens with one and two arms removed). The broken 

 line gives the average of Series III. -IV. (the specimens with three and four arms re- 

 moved). The uppermost curves show the conditions 22 days, the middle curves 33 

 days, and the lowermost curves 46 days after the operation. 



