Q. R, Wieland — Archelon ischyros. 409 



ovoid projection whose inner boundary as seen from above is a 

 very shallow sigmoid curve. The trochanteric fossa is narrow 

 and deep posteriorly, but widens and becomes slightly shallower 

 immediately in front of the head, again narrowing and disap- 

 pearing just beneath the head. Just above the most con- 

 stricted portion of the shaft on the outer side is a lesser tro- 

 chanter. It is merely a slight inconspicuous convexity. The 

 distal extremity is broad and heavy with a marked downward 

 turn. It is very regular in outline, the external and internal 

 condyles being nearly equal and the intercondylar fossa very 

 shallow. The surface of the bone, like that of the humerus is 

 striate, the striations being most marked distally, with slight 

 longitudinal pitting. 



Measurements of left Femur. 



Meters. 



Extreme length -46 



Diameters of head 11-5 and -129 



Diameter of neck 0*8 and *! 1 



Transverse distance through great 



trochanter _ -185 



Least diameters of shaft '075 and -095 



Greatest distal breadth -23 



Greatest distal thickness -105 



Tibia. — The tibia is nearly as large a bone as the ulna, fully 

 as large proximally. There are two slight concavities in the 

 proximal articular face for the reception of the femoral con- 

 dyles. These are separated by a triangular convexity heaviest 

 on the outer side. The outline of the articular -face is that of 

 an ellipse very distinctly flattened on the inner side. The 

 distal articular face is flatly convex and broadly elliptical in 

 outline. It is expanded into a kind of collar or foot for the 

 shaft. 



Measureme7its of left Tibia. 



Meters. 



Length _ -33 



Antero-posterior length of proximal 



articulating surface.- '15 



Transverse measure '10 



Least diameters of shaft '042 and -00 1 



Diameter of distal extremity ..... '105 and -109 



Measurements of left Fibula. 



Length '31 



Greatest proximal diameters '082 and '085 



Least diameters of shaft - '035 and -045 



Distal diameters _ 'lOS and '085 



