452 



Charles R. Stockard 



specimen, column three the original diameters in millimeters of 

 the medusae disks, column four of the upper half of the table the 

 diameters after 17 days and the lower half contains the diameters 

 after 24 days. The numbers in column five are obtained by sub- 

 tracting those in column four from those in three and represent 

 the average decrease in diameter of the disks. Column six indi- 



TABLE V 



Regeneration of the oral-arms in Cassiopea, when four arms are removed 



cates the actual percentage of decrease in diameter in terms of the 

 original size. The seventh column gives the average lengths of 

 new buds in each group. Column eight shows the specific amounts 

 of regenerated tissue calculated by dividing the numbers of col- 

 umn seven, the length of new buds, by the numbers in column 

 three, the original disk diameters. Column nine gives the spe- 



