NO. 1 



TH1-: HVl'OTROCHANTERIC FOSSA HRDLTCKA 



27 



In view of the inequalities of the series it will be best to give each 

 racial group a brief separate consideration. 



U. S. WHITES 



Hypotrochanteric Fossa in U. S. Whites, Children, Adolescents, and SubaduUs 



" From data given in preceding section. 



Though the number of specimens in the adolescent and subadult 

 class is small, they nevertheless show that remarkable changes in the 

 fossa have been effected during the growth period. The proportion of 

 the " absent ", " trace ", and " small " have markedly diminished, and 

 the proportions of the " moderate " to " pronounced " cases have 

 correspondingly increased. The fossa plainly has continued to de- 

 velop, and in a few instances has probably even originated, during the 

 adolescent period. 



U. S. NEGROES 



Hypotrochanteric Fossa in U. S. Negroes, Children, Adolescents, and Subadults 



" One a groove. 



The " absents " in these series have probably remained much the 

 same and would seem to indicate that in this racial group no new 

 fossae have originated after infancy. For the rest there are seen the 

 same phenomena as in the Whites, but still more pronounced: the 

 " traces " and the " small " fossae have diminished, the " moderate " 

 to " pronounced " have very markedly increased. The fossa has kept 

 on growing during the adolescent to subadult period. 



