28 Osteology of Circus hudsonius. 
dyles are about on the same level at their lowest points. If the 
Fig. 11. Right humerus of C7rcus, anconal aspect. 
Fig.12. Anterior view of the right tibia and fibula of C7z7cus. 
. Fig. 13. Same view of the corresponding tarso-metatarsus. 
Fig. 14. Proximal extremities of right tibia and fibula viewed directly from above ; same 
bones as shown in Fig. 12. The line of the cnemial crest is the lowest in the cut, and 
the fibula projects posteriorly. 
Fig. 15. Proximal extremity of right tarso-metatarsus; same bone as Fig. 13, held in the 
same positicn as the last, the hypotarsial processes directed upwards in the cut. 
Fig. 16. Same aspect of the tarso-metatarsus of C7yrcus, promimal third of the same bone 
as Fig. 13. 
Fig.17. Anterioraspect of the right femur of C7rcus, from the same limb as the bones shown 
in the former figures. All life size from nature, and the same specim -ns as Figs. 1 to4 
