78 



The proximal end has its articular face for the humerus 

 divided into three facets, the vertical being long and extreme- 

 ly convex ; the horizontal has the pre-axial face the longer. 

 The olecranon is very massive and rugose, sending up on its 

 external side a high, pointed projection ; while on the internal 

 side, the olecranon becomes compressed and projects inward ; 

 these tuberosities are separated by a wide, shallow groove 

 for the tendon. The distal articular face is large, single, and 

 is concave antero-posteriorly, and convex laterally. The sty- 

 loid process is very heavy. 



Measurements of Ulna. 



M. 



Length of sigmoid notch . . 089 



Width of sigmoid notch (horizontal face) -049 



Diameter of proximal end below articular face (fore and aft) -076 



Diameter of proximal end below articular face (transverse) -059 



Diameter of distal articular face (fore and aft) -061 



Diameter of distal articular face (transverse) -051 



Length of olecranon -112 



Pelvis. The ilia are greatly expanded laterally, with 

 the iliac surface concave and the gluteal surface nearly 

 flat ; thin in the middle, they increase in thickness near 

 the borders. The crests curve regularly, and project 

 above and beyond the sacrum, but do not bend over the 

 acetabula. The acetabular borders are only slightly con- 

 cave ; the prominence for the attachment of the rectus 

 muscle (extensor) is low and V-shaped. The direct internal 

 surfaces of the ilia, comprised between the pubic and ischiatic 

 borders, become deeply concave below the ischiatic portion 

 of the acetabulum. The sacral surfaces are wide and tri- 

 angular in shape ; above they project beyond the sacral 

 spines. 



The ilio-lumbar angle is about 1 10. The ischium is short; 

 a section of it, as it leaves the acetabulum, is subtriangular ; 

 but immediately it becomes flattened fore and aft throughout 

 its plane of 90 to the axis of ilium ; then verging toward the 

 pubic symphysis it becomes small. The tuberosity of the 

 ischium is small and directed up. 



The pubis, as it leaves the acetabulum, is sub-cylindrical, 

 after this it is flattened in the same plane with the ischium 



