38 



GENETIC STUDIES OF RABBITS AND RATS. 



Mean femur, 80.80 ±0.19. S. D. femur, 5.20 ±0. IS. 



Mean skull, 73.06 ±0.16. S. D. skull, 4.53±0.11. r, 0.871 ±0.008. 



Mean tibia, 93.74 ±0.20. S. D. tibia. 5.45 ±0.14. 



Mean skull. 73.06±0.16. S. D. skull. 4.54±0.11. r, 0.806±0.015. 



