120 



GENETIC STUDIES ON A CAVY SPECIES CROSS. 



Table 61. 



Coefficients of variability for the weights of the males in the parent races and hybrids, at six 



successive ages. 



Number of 

 individuals. 



Class. 



Ages in days. 



100 



180 



260 



300 



340 



380 



Average of 

 coefficients. 



4. 



6. 

 15. 

 62. 



Wild 7.29 



J wild 13.56 



i wUd 12.29 



i wild 12.23 



*28 Guinea-pig . 



53 ' Guinea-pig . 



10.24 



8.22 



6.17 

 12.16 

 13.38 

 11.47 



7.84 

 10.41 



4.99 

 10.74 

 10.24 

 10.63 



8.16 

 10.19 



4.49 

 9.94 

 9.16 

 10.09 

 8.16 

 8.17 



4.59 

 8.99 

 8.00 

 10.20 

 9.60 

 8.03 



4.80 

 8.19 

 8.08 

 10.67 

 9.90 

 6.34 



5.39 



10.60 



10.19 



10.88 



8.98 



8.56 



*Small inbred strain. 

 Table 62. 



Coefficients of variability for the weights of the females in the parent races and hybrids, at six 



successive ages. 



*Small inbred strain. 



Table 63. 



Averages in millimeters of sixteen different skeletal dimensions of the males in the parent races 



and in hybrids. 



