272 



MARIO GARCIA-BANUS 



TABLE 5 



Time in hours required for the emergence of the oral hydranths in pieces of different 



length » 



Ratio of the length of the pieces = 1:4. 



Series A Apical piece = 10 mm. Basal piece = 40 mm. 



Series B Apical piece = 40 mm. Basal piece = 10 mm. 



is very small indeed but the same in both series. There was no 

 influence of the level factor. 



In the experiment recorded in table 4, the ratio of the lengths 

 of the pieces was 1:3. In series A the shorter piece of 10 mm. is 

 the apical one and the longer piece of 30 mm. is the basal one, 

 while in series B the reverse occurs. The averages are in series 

 A: for the short apical piece 72.0 hours, and for the longer basal 

 piece 68.8 hours; in series B: for the longer apical piece 73.9 

 and for the shorter basal one 77.1. The differences between the 



