CHANGE IN VOLUME OF EGGS AT FERTILIZATION. 



TABLE III. Continued. 



FEMALE B. INDIVIDUAL EGGS. 



Of 100 eggs 3 had a diameter of 90.4 micra. 



Of 100 eggs 3 had a diameter of 91.6 micra. 



Of 100 eggs 2 had a diameter of 94.2 micra. 



Of 100 eggs I had a diameter of 96.8 micra. 



Of 100 eggs i had a diameter of 100.8 micra. 



Of 100 eggs i had a diameter of 102.0 micra. 



Of 100 eggs i had a diameter of 112.6 micra. 



TABLE IV. 



FEMALE C, INDIVIDUAL EGGS. 



Average of 12 = 90.0 



Average of 4 = 96.5 



Average of 2 = 107.3 



Average of 3 

 Average of 8 

 Average of 13 



= 63.7 



= 69.4 



= 72-9 



Average of 26 = 78.5 



Average of 29 

 Average of 15 



82.6 



86.7 



92.4 



Average of 4 

 Average of i = 100.0 



If one treats the diameters and eggs in groups of three, and 

 plots the latter on the ordinate and the former on the abscissa 

 the following curve emerges for female B. 



CURVE B. Diameters of 100 eggs from one specimen of Arbacia punctulaia. 



