'J.)2 JOHN C. KOCH 



tlio Irabeculae branch off IVoin \\w sluift^ in sinootli curves, 

 sprcvulinji; radially to cross to the opposite side in two well- 

 defined <>;r()ups: a lower, or secondary group, and an upper, or 

 principal group. The former consists of the thin light trabeculae 

 which cross over from the medial part of the shaft to end in the 

 opposite side in the region of the greater trochanter and in the 



Fig. 21 P'rontal longitudinal mid-section of upper left femur. Companion 

 to the right femur analyzed in Part III. The same femur is shown in figs. 24 

 and 25. (Natural size.) 



