SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL 72, NO. 10, PI. 2 



Fig. 10. Reconstruction of a second type bone with its circulation. 



11. Cross section of the femur of a turkey buzzard, Cathartes aura 



septentrionalis, showing the structure. 



12. Tangential section of the same, showing the circulation. 



13. Tangential section of the femur of a domestic chicken, Callus, show- 



ing the circulation. 



14. Tangential section of the femur of a prairie chicken, Tympanuchus 



americanus, showing the circulation. 



15. Tangential section of the femur of a domestic duck. Anas domestica, 



showing the circulation. 



16. Cross section of the femur of a fruit bat, Pteropus (Celebes), showing 



the structure. 



17. Tangential section of the same, showing the circulation. 



18. Cross section of the femur of a lamb, Ovis, showing the structure. 



19. Tangential section of the same, showing the circulation. 



20. Cross section of the femur of a Mexican Inirro, showing the structure. 



21. Tangential section of the same, showing the circulation. 



