Fch'tors III Regrnrratio}! , ^2/ 



I.} mm. long and bearing a distal polyp, were kept carefullv ori- 

 ented. The third day after amputation the apical hydranths had 

 disintegrated. On the fourth day polyps were first regenerated and 

 appeared invariably at the basal ends. One lateral polyp only 

 was produced, two oral polyps appeared on the seventh day, there- 

 fore not mentioned in the table; in no case were polyps regenerated 

 at both ends. The following table gives the actual figures: 



TABLE lo 



Polvps Regenerated 



•J days 6 days 



on :> . J 



Oral ends o o 



Lateral ends o 3% 



Basal ends .' . o 44% 



When pieces of the same kind as the preceding were ligatured 

 at their distal ends, regeneration was not accelerated, nor was the 

 number of basal polyps increased. The figures are remarkably 

 like those in the preceding, viz: 



TABLE II 



Polyps regenerated 



on 3 days 6 days 



Oral ends o 7%* 



Basal ends o 43% 



*The coenosarc withdrew completely out of perisarc and then formed an oral hydranth. This 

 matter will be taken up under "coenosarc.'' 



When pieces about ih mm. long (smaller than those in Experi- 

 ment 9) %vere used, the number of heteromorphic polyps was prac- 

 tically the same as in the experiment just mentioned, though in pro- 

 portion to the number of oral polyps there was a far greater basal 

 regeneration in the smaller pieces. Furthermore, an apical ligature 

 did not accelerate regeneration nor did it increase the number of basal 

 polyps. 



Experiment II. This tendency to produce more polyps at the 

 basal ends is also clearly demonstrated w^ith internodes of stems. 

 The internodes of several stems were cut off and oriented, and so 

 arranged that it was possible at a glance to tell to which part of the 

 stem each internode belonged. All doubtful pieces were rejected. 

 The 55 mternodes regenerated as follows: 



