GENETIC STUDIES OF RABBITS AND RATS. 



37 



Mean weight, 2,143.6±16.8. S. D. weight, 446.6±11.9. 



Mean tibia. 93.77 ±0.20. S. D. tibia, 5.29 ±0.14. r, 0.768 ±0.015. 



Mean humerus, 64.16 ±0.13. S. D. humerus, 3.77 ±0.09. 



Mean skull, 72.96 ±0.16. S. D. skull, 4.46 ±0.11. r, 0.834 ±0.011. 



