30 



GENETIC STUDIES OF RABBITS AND RATS. 



Tablb 3. — Classifieation as to weight of the several groups of raibbits studied. 



[Class 10 includes weights 1,000 to 1,099 grams; class 11 includes weights 1,100 to 1,199, 

 etc. There are no data for columns 11, 32, 33, 35 to 39, and they are therefore omitted.] 



Table 4. — Statistics of variation in millimeters of ear-length in the several groups of 

 Pi, Fi, and Ft rabbits studied. 



Table 5. — Comparative average ear-length in 

 millimeters of males and females in the 

 groups of rabbits studied. 



