GENETIC STUDIES OF RABBITS AND RATS. 



35 



TABLE 16. Correlation of ear-length with tibia-length. 



Mean ear-length, 105.42 0.41. S. D. ear-length, 11.48 0.29. 

 Mean tibia, 93.64 0.19. S. D. tibia, 5.27 0.13. r, 0.741 0.016. 



TABLE 17. Correlation of weight with skull-length. 



Mean weight, 2,141.016.9. S. D. weight, 447.011.9. 



Mean skull-length. 73. 17 0.16. S. D. skull-length, 4.38 0.11. r. 0.852 0.010. 



