CONDYLAETHRA. 457 



Measurements of femur, 



M. 



Total length from head SS-^ 



Length to line of middle of third trochanter 097 



Length to internal rotular crest 185 



Diameters of head J ^°°S 035 



( short, at middle 028 



Total width proximally 071 



Total width at third trochanter 047 



Total width below third trochanter 031 



Width of rotular groove, with crests 025 



Greatest width of condyles 058 



Depth of condyle at inner rotular crest 068 



I longitudinal 032 



Diameters of patella < transverse .028 



' anteroposterior above 019 



The tibia is about as long as the femur, and, like it, is a rather robust 

 bone. The crest is thick and not prominent, and at its proximal part is 

 broadly truncate. The halves of the spine are well separated from each 

 other. The external cotylus is a wide anteroposterior oval, slightly con- 

 cave. The interior femoral face is of somewhat similar form, but is much 

 decurved posteriorly, so as to be convex anteroposteriorly. The popliteal 

 notch is wide and regularly concave. The external lateral fossa is well 

 marked only proximally; the posterior edge of this side is obtuse. The 

 posterior edge of the external side is more acute above, but disappears be- 

 low. The section of the shaft is triangular, but the obtuse anterior angle 

 becomes the anterior edge of the malleolus. The latter bounds most of the 

 internal astragalar groove, sinking posteriorly. The tibia projects behind 

 the groove mentioned, so that the posterior face is not flat in the transverse 

 direction like the anterior face. The transverse diameter of the astragalar 

 articulation coincides with that of the head of the tibia, and the astragalar 

 grooves are at right angles to it. • 



The fibula is moderately slender, with rather large exti-emities. The 

 proximal surface is an anteroposterior oval, concave to fit a posterior con- 

 vexity of the tibial facet. The distal extremity is truncate, and has a nearly 

 vertical internal face. Its anterior face is about as wide as its exterior, 

 and the angle they form has a low tuberosity. No tendinous grooves. 



