FEMUR OF HESPERORNIS. 89 



The femur is one of the most characteristic bones in Hesperomis 

 regalis, and to show its variation in the species, measurements are given 

 below from five different individuals, the first, number 1200, being the type: 



Measurements of Femur. (No. 1200.) 



Left. Right. 



Length of femur, 99.0 mm 99.0 mra 



Antero-posterior diameter of head of femur, 18.5 18.5 



Greatest proximal diameter of shaft, 53.0 52.0 



Greatest distal diameter of shaft, 53.0 54.0 



Least transverse diameter of shaft, 22.5 22.0 



Least antero-posterior diameter of shaft, 18.0 19.2 



Greatest diameter of distal articulation, 53.0 53.0 



Greatest diameter of tibial articulation, 40.0 40.0 



Transverse diameter of fibular articulation, 14.0 14.5 



Greatest diameter of inner condyle, 21.0 21.0 



Least diameter of inner condyle, 14.0 14.5 



Length across the curve of ridge between tibia and fibula, 27.0 25.0 



Measurements. (No. 1206.) 



Length of left femur, 96.0 mm 



Diameter of head of femur, 18.0 



Transverse diameter of proximal end, 51.0 



Transverse diameter of shaft near middle, 22.0 



Transverse diameter of distal end, 49.0 



Greatest diameter of distal articulation, 49.0 



Greatest diameter of tibial articulation, 37.0 



Transverse diameter of fibular articulation, 14.0 



Greatest diameter of inner condyle, 21.0 



Least diameter of inner condyle, 13.0 



Length of ridge between tibia and fibula, 25.0 



Measurements. (No. 1207.) 



Left. Eight. 



Length of femur, 98.5 mm 101 .0 mm 



Antero-posterior diameter of head of femur, 19.0 1 8.5 



Transverse diameter of proximal end, 52.0 52.0 



Least transverse diameter, near middle, 22.0 22.0 



Transverse diameter of distal end, 52.0 53.0 



Antero-posterior diameter, near middle, 18.0 1 8.0 



Greatest diameter of distal articulation, 53.0 53.0 



Greatest diameter of tibial articulation, 40.0 40.0 



Transverse diameter of fibular articulation, 15.0 16.0 



Greatest diameter of inner condyle, 21.0 21.0 



Least diameter of inner condyle,. 13.0 13.0 



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