66 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 6l 



Periostitis adults 3 



1 slight, localized. 



2 moderate, localized. 



Cambinations of lesions on same bone none 



OSSA INNOMINATA 



Number of adult bones examined 694 



Number of children bones examined 30 



Total 724 



Of these: 



Fractures 



Dislocations of femur, unreduced adults 8 



all early, with an irregular, shallow new joint 

 above the cotyloid cavity. 

 Exostoses adult 1 



moderate, just above acetabulum. 



" Mushroom " cavity adults 25 



10 well-marked. 



14 shallowing of cotyloid cavity and defects or 



lesions antero-superiorly in and above the 



border of the cavity. 

 1 moderate, in an adolescent. 



Combinations of lesions on same bone none 



SACRUM 



Number of adult bones examined 199 



Of these: 



Arthritis 29 



jy arthritic exostoses, upper bordtr. 

 2 of the above also joined to pelvis both sides. 



Other lesions: erosion-like defects, anterior surface 1 



Combinations of lesions on same bone: 



2. Arthritis upper border, and of both the iliac articular 



surfaces. 

 1. Arthritis upper border, and erosion-like defects an- 

 terior surface. 



Special 



Sacral segments: 4—0; 5—79 (58%); 6—56 (41%); 7—1 

 (0.7%) ; 63 undeterminable because of damage. 



