GENETIC STUDIES OF RABBITS AND RATS. 



31 



TABLE 6. Variation of skull-length in the several groups of rabbits studied. 

 [All measurements in millimeters.] 



TABLE 7. Variation in millimeters of anterior skull-width in the 

 several groups of rabbits studied. 



TABLE 8. Variation in millimeters of posterior skull-width in the several 

 groups of rabbits studied. 



