GENETIC STUDIES OF RABBITS AND RATS. 



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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. 



Mean weight, 2,141.0±16.9. S. D. weight, 447.0±11.9. 



Mean skull-length, 73.17±0.16. S, D. skull-length. 4.38±0.11. r, 0.852±0.010. 



