SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE 



VOL. 35. NO. 3. PL. 34 





i^'^/^--^-^ 



WM 

 ^ 







Fig. 419 

 Keniur of an Australian. No. 227420, U. S. N. 



Fig. 42U 

 Left femur of a male white. 



No. 94, C. M. C. 



Fig. 421 

 Right femur of a male white. No. 142, M. D, N. U. 



n.KH (AUSTR.\U.\N; WHITE RACE) 



Fig. 423 

 .\ single Haversian system 

 enlarged showing lamellaj 



Fig. 424 



Haversian system shoeing 



early stage of senility 





Fig. 425 



Haversian system showing' 



later stage of senility 



I 10. 420 



Haversian system showing 



latest stage of senilitv 



DIAGRAMS SHOWING STAGES OF SENILITY 



