44 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 92 



llypotrochanleric Fossa in the Aged 



" The majority from elderly subjects. 



the " moderate " to " medium " have markedly diminished, and the 

 " pronounced " forms are now wholly absent. The representation of 

 the fossa in the aged, in comparison to the general adult quantum, is 

 decidedly lessened. The regression of the hollow has therefore con- 

 tinued throughout adult life, and that in favor of the gluteal ridge, 

 which kept on developing. Thus by the time senility is reached, the 

 hypotrochanteric fossa has been largely, and in many cases entirely, 

 assimilated or replaced by the gluteal ridge. 



SIZE OF THE FOSSA 



Evangeli-Tramond, it was seen, reported fossae up to 4 to 5 cen- 

 timeters in length, i centimeter in breadth, and several millimeters 

 in depth. Measurements of 20 of the largest fossae I encountered 

 gave the following values : 



.\dolescent, I'erii . . 



Child, '■ '.'. 



Adolescent, " 



S. Daiv. 



Subaduit, Aleut . . 



Adult, Peru 



Egypt .... 

 Adolescent, Peru . 



Ohio . 



Egypt 

 Subaduit, Eskimo 

 Adult, Louisiana . 



Egypt 



Length 

 (max.) 



9 4 



Breadth 

 (max.) 



m m 



12 



10 



12.5 

 II 



9 

 9 



1 1 

 1 1 

 1 1 

 12 

 12 

 10 

 10 

 10 

 10 

 12 

 10 

 10 



9-5 



9 



Depth 

 (max.) 



mm 



1-5 



2 



I 



2 



I 



2 



3 



4 



3 



3 



3 



4 



4 



3 



3 



2 



4 

 3 

 2 

 2 



