PECTORALIS MAJOR AND DELTOID INSERTION 



161 



TABLE 1 



Averages, standard deviations, variation coefficients, their probable errors and ranges 

 of variation for the length of the humerus 



longer than in females. The averages in negroes exceed in both 

 sexes the corresponding values for whites. The division of table 

 1 into separate rows for the right and left humerus shows 

 that the variability is greater on the left side except in the 

 group of white females of which the number measured was quite 

 small. Furthermore it shows that the white males, who possess 

 the same average length of the humerus on both sides, form an 

 exception to the rule of the greater length of the humerus on the 

 right side. Table 2, which gives a survey of the absolute and 



TABLE 2 



Absolute and relative numbers of individuals uiith equal and different lengths of the 

 humeri and average differences of the individual asymmetries (mm.) 



