2G2 
PROFESSOR H. G. SEELEY OR THE STRUCTURE, ORGANIZATION, 
space is 3‘5 ceiitims. wide, and extends as a shallow concave channel between the 
distal parts of the condyles; it rounds convexly on to the broad shallow saddle of the 
middle of the distal articular surface. The posterior surface of bone between the 
upper parts of the condyles is a shallow concavity, and the surface, which becomes 
flatter as it extends proximally, is slightly concave in length, but gives to the eye the 
aspect of being flattened. It is about 30 centims. long, and 9 centims. wide in the 
middle, aud widens a little proximally and distally. Its external border is the external 
margin of the bone, which is concave in length, and forms a sharp ridge proximally, 
and is more rounded distally towards the condyle. Its internal border is a slight 
ridge which descends from the inner margin of the obturator pit concavely towards 
the outer border of the tibial condyle, without quite reaching it; so that it appears 
to divide the proximal half of the hinder surface of the bone into an external area, 
which is slightly concave, and an internal area, which is strongly convex, rounding 
on to the superior or anterior surface. The thickness of the bone through the condyles 
is about 12‘5 centims. ; while the thickness between the condyles is 10 centims. On 
the aiiterior aspect the inner condyle has a sub-globate form, well rounded; while the 
external condyle is laterally compressed so as to rise into a blunt ridge, which is 
prolonged for a third of the length of the shaft, and then subsides into a slight ridge 
which extends outward towards the proximal trochanteric extremity of the bone. 
This ridge defines the external surface of the shaft, which looks outward and a little 
upward, widens distally, is concave in length, and somewhat convex in the direction 
of thickness of the shaft. The narrowiiess of the proximal part of the lateral area is 
coincident with vertical compression of the proximal part of the shaft. 
On the internal side of the distal end of the shaft there is a blunt lonoitudinal 
O 
ridge, which makes the superior front part of the area concave, .nnd the inferior 
posterior part longitudinally convex. This ridge, as it descends, is inclined backward 
at an angle to the axis of the shaft. The proximal part of the shaft widens on both 
the inner and outer borders ; but the articular head is inclined, as usual, upward and 
inward, forming a large sub-hemispherical convexity, which inflates the superior 
anterior aspect of the bone, making it convex in the transverse direction, and concave 
in length, but flattened, or even a little concave, on the outer side. Seen from the 
proximal extremity, the articular head is sub-reniform, being rather concave behind. 
It is worn, but appears to be 20 centims. wide, and 10 centims. from front to back, so 
that it is somewhat compressed from front to back, and flattened posteriorly. It 
becomes narrower as it extends outward, and retreats in a convex curve. The reo-ion 
of the external angle or great trochanter is broken away, but the compression of the 
bone does not suggest the presence of any strong trochanteroid process. 
The obturator pit is a shallow depression which is imperfectly excavated, which lies 
external to the median longitudintd ridge already described on the posterior aspect of 
the bone, and which dies away at about 14 centims. from the proximal extremity of 
the bone. The pit is limited inferiorly by a slightly elevated ridge with a concave 
