334 Florence Peebles 



on each side of the hne of union. A difference was observed in 

 the number of aboral hydranths on the distal piece, although this 

 is not shown in this table. Eight out of the twenty formed aboral 

 hydranths in this experiment where the two components were of 

 the same length, and in the first experiment where the proximal 

 component was much shorter than the distal, only five out of 

 twenty-seven, formed an aboral hydranth on the longer piece. 



TABLE 5 



Hydranths on the oral end of Z) 9 



Hydranths on the oral end of P 11 



Hydranths on aboral end of Z) 8 



Hydranths on aboral end of P 4 



Total number of pieces 20 



Before combining the results from the three pieces the behavior 

 of pieces A and C (Fig. 9) will be considered very briefly. These 

 two pieces were about the same length, but they were not taken 

 from the same region of the original stems, and while the oral and 

 aboral ends oi A were exposed at the same time, those of C were 

 not. The aboral end of C had a start of twenty-four hours. In 

 Table 6 the results from twenty pieces are given. 



TABLE 6 



Oral hydranths A i6 C 3 



Aboral hydranths A 2 C 15 



Aboral stolons A i Co 



No regeneration A i C i 



Total number of pieces 20 



In order to compare the behavior of the three pieces Table 7 

 was made showing the results from twenty-one of the double 

 components. In these grafts the second operation followed the 

 first after a period of twenty-four hours. 



Experiment j. In a third series of experiments, instead of 

 allowing the grafts to remain twenty-four hours before the second 

 operation, the time was shortened, and after three to four hours, 

 the pieces were isolated. The results are given in Table 8. 



