i go 



L. V. MORGAN. 



tion was in every case rapidly taking place, and where checks were 

 possible, pieces with and without ganglia were in the same con- 

 dition. For example, in 5a, half-worms retaining one ganglion, 



8 



FIG. A, Diagrammatic figures of (l-6), worms regenerated after injury, indicated 

 in each case by the accompanying small diagram. (7, 8 ), Regenerated pieces cut out 

 of the head of the worm, and including cephalic ganglia and eye-spots. (9), Nor- 

 mal worm. 



kept in the same dish with those without ganglia, regenerated at 

 about the same rate. 



In the pieces deprived of ganglia, the cut surfaces fused 

 together, new tissue was formed, and eye-spots appeared in 



