Acetabular cup
FIG. 1 is a top plan view of an acetabular cup showing my new design; 
     FIG. 2 is a bottom plan view of the acetabular cup of FIG. 1; 
     FIG. 3 is a side elevational view of the acetabular cup of FIG. 1; 
     FIG. 4 is a sectional view of the acetabular cup taken along lines 4--4 of FIG. 1.