90 ODONTORNITHES. 



Measurements of Femur. (No. 1476.) 



Length of right femur, 105.0 mm 



Diameter of head of femur, 19.2 



Transverse diameter of proximal end, 54.0 



Transverse diameter of shaft near middle, 21.0 



Transverse diameter of distal end, 53.0 



Vertical diameter, near the middle, 19.0 



Greatest diameter of distal articulation, 53.0 



Greatest diameter of tibial articulation, 38.0 



Transverse diameter of fibular articulation, 15.5 



Greatest diameter of inner condyle, 20.0 



Least diameter of inner condyle, 13.0 



Length of ridge between tibia and fibula, 25.0 



Measurements. (No. 1477.) 



Length of right femur, ■_ _ 97.0 mm 



Antero-posterior diameter of head of femur, ] 9.0 



Greatest proximal diameter of shaft, 53.0 



Greatest distal diameter of shaft, . 51.0 



Least transverse diameter of shaft, 23.0 



Antero-posterior diameter of shaft, near middle, 20.0 



Greatest diameter of distal articulation, 52.0 



Greatest diameter of tibial articulation, 38.0 



Transverse diameter of fibular articulation, . 15.0 



Greatest diameter of inner condyle, 20.0 



Least diameter of inner condyle, 12.5 



Measurements. {Hesperomis crassipes, No. 1474.) 



Maximum diameter of distal end of right femur, 5 1.0 mm 



Transverse diameter of shaft, 21.0 



Vertical diameter of shaft, 21.0 



Greatest diameter of shaft, at middle, 25.2 



The Tibia. (Plates XIV and XX.) 



The tibia of Hesperomis regalis is very long and powerful, and much 

 the largest bone in the skeleton. In its general features, it most resembles 

 the tibia in the genus Podiceps. It is somewhat expanded at its proximal 

 end, where it articulates with the femur, and the articular faces are placed 



obliquely, and inclined outwards. The inner articular face is much the 

 larger, and is slightly concave. The outer face is somewhat convex, and is 

 only partly separated from the other by a constriction of the articular 

 surface. The outer articulation projects considerably beyond the external 



