40 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. i)2 



suffers through more or less extensive deposits of new bone in its lu- 

 men ; that this new bone becomes assimilated by the gluteal ridge, or 

 forms a gluteal tuberosity (third trochanter), or both; and that the 

 diminution in the fossa progresses from above downward and from 

 the gluteal ridge outward until but a lateral or lateral-inferior rem- 

 nant of the hollow is left, or all traces of it are lost ; but that in some 

 cases the fossa appears to diminish also by interstitial growth of the 

 bone underlying and surrounding it. 



DIFFERENCES IN ADULTS IN THE TWO SEXES 



Owing to the availability of good series of material, it is possible 

 to give here reliable data as to the sex differences in the hypotro- 

 chanteric fossa. The White and Negro bones were sexed from the 

 bodies ; in a large proportion of the other specimens the sexing was 

 supported by the rest of the skeleton (with occasionally significant 

 articles found in the grave), and the rest were sexed simply on the 

 basis of ample experience. The data will best be given together: 



Hypotrochanteric Fossa and Sex, in Adult Femora 



Group and no. of femora 



U. S. Whites: 



Male (600) . . . 

 Female (400) . 



U. S. Negro: 



Male (64). . . . 

 Female (36) . 



Old Egyptians: 

 Male (120). 

 Female (80) . 



None 



Old Peruvians: 

 Male (268)... 

 Female (600) . 



N, 



A. Indians: 

 Male (1,749). . 

 Female (2,141). 



Eskimos: 



Male (369). . . 

 Female (349) . 



Percent 

 31-5 



23 -4 



(44-4) 



20.8 

 20.- 



30 -3 

 21.8 



13-8 

 10.9 



10.- 

 10.9 



Trace 



Percent 



16.3 

 21 .- 



17.2 

 13 9 



II. 7 

 13.8 



17. 1 

 12.2 



20- 

 19.2 



18.2 

 19.2 



Small 



but 



distinct 



Percent 

 19.7 

 20.5 



21 .9 



25- 



24.2 

 26.3 



36.9 

 36.3 



313 



32-9 



26.6 

 21.5 



Mod- 

 erate 



Percent 

 16.7 

 145 



15-6 

 2.8 



16.7 

 20- 



10.5 

 193 



20.- 

 21.3 



21 .9 

 22.6 



Medium 



Percent 

 10.7 



18.8 

 13-9 



18.3 

 15- 



4-5 

 9- 



12.9 

 135 



17.6 

 21.5 



Above 

 medium 



3-3 

 1-5 



31 



2.5 

 3-7 



1-4 

 1.6 



3-3 

 3-4 



Pro- 

 nounced 



Percent 

 0.2 

 0.3 



5-8 

 1 .2 



0.3 



0.6 

 0.6 



2.4 

 0.9 



Of 



which 



fossa- 

 groove 



Percent 



(1.8 

 (1-7 



(3.1 

 (2.8 



(0.1 



(4.6 



(1-7 



Condensed and rough 

 means of all: 

 Male (3,170). . 

 Female (3,606) 



21.8 

 24.9 



43-5 

 43-6 



30.8 

 30.7 



3-9 



2.4 



(2.9 



(2.- 



