REGENERATION IN TUBULARIA CROCEA. 



303 



the blunt end of a large needle about the diameter of a tubularian 

 stem, rows of holes were made in the paraffine about 0.5 mm. in 

 depth. The dishes were filled with water and the long pieces of 

 stems were put in them and cut into consecutive pieces about I 

 mm. in length. One end of each piece was then inserted in a 

 hole that was just large enough to receive and hold it upright. 

 This method has the advantage that the inserted end of the piece 

 of stem is in contact with the paraffine and cannot become free if 

 the experiment is properly done. The results of this series of 

 experiments are summarized in the following tables in which the 

 abbreviations used are the same as those previously employed. 



TABLE XI. 



TABLE XII. 



TABLE XIII. 



TABLE XIV. 



