GENETIC STUDIES OP RABBITS AND RATS. 33 



Table 12. — CorrdaHan o/ ear-len/glh with umght. 



Mean ear-length, 105.35±0.43. S. D. ear-length, 3.86±0.10. 



Mean weight, 214.15±16.8. S. D. weight, 448.6±11.9. r, 0.836 ±0.011. 



Table 13. — Correlation of ear-length with akiiU-length. 



Mean ear-length, 105.45±0.42. S. D. ear-length, 11.46±0.28. 



Mean skull-length, 73.03±0.16. S. D. skull-length, 4.42±0.11. r. 0.836±0.011. 



