92 



Charles Zeleny. 



dinate paper (p. 90, Fig. 29) show, the correlation is not a perfect 

 one, /. f., it is positive but equal to slightly less than one. The 

 results of such a comparison are given for both the first and the 

 second moults in Tables XIII-XVI. 



Table XIIL Alpheus dentipes. Length of Regenerated Cutting Chela. Cutting 



Chela Removed. 



Table XIV. Alpheus dentipes. Length of Regenerated Cutting Chela. Snapping 



Chela Removed. 



The tables show that Cu + Sn has a very distinct advantage 

 over Cu alone or Sn alone. This advantage amounts to 19.1 per 

 cent for the first moult and 16.5 per cent for the second moult. 

 Just after the first moult the cutting chela regenerated from the 

 breaking joint surface of what was formerly the snapping claw 

 has a distinct advantage ovier the cutting chela regenerated from 

 a removed cutting chela but this advantage is nearly overcome 

 at the time of the second moult. 



