INHERITANCE IN HYDATINA 



59 



D X C. Females of line D were mated with males 'of line C 

 October 16 to 21, 1911. From 47 such matings were obtained 660 

 eggs which were kept under observation until December 8, at 

 which time 214 eggs, or 32.4 per cent, had hatched. Half the 

 eggs were kept until December 20, and two more were hatched; 

 but these two are not included in table 7 as they would not greatly 



TABLE 6 

 Showing details of parthenogeneiic line C X D, figure 1 



Percentage of cf 9 



44.6 



Remainder of family not recorded. 



TABLE 7 

 Showing number of eggs that hatched, out of 660 in lot D X C, figure 1 



Percentage of viable eggs. 



32.4 



Standard deviation: o-h = 7.79 <t;, = 2.15 



