GENETIC STUDIES OF RABBITS AND RATS. 



31 



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

 {AH measurements in millimeters.] 



Table 7. — Variaiion 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. 



