280 



HENRY H. DONALDSON 



and tibia become relatively shorter. The changes are, however, 

 very slight, and by the use of the mean values here given it 

 should be possible to recover the body length of a rat over 100 

 grams in body weight, when the fresh length of one or more of 

 these bones is known. 



Chart 18 Length of fresh fore-limb bones in millimeters, on body length 

 (albino rat). Table 22. 



X Ulna. • Humerus, o Radius. 



Chart 19 Length of fresh hind-limb bones in millimeters, on body length 

 (albino rat). Table 22. 

 X Tibia. • Femur. 



