196 
torted and nearly perfect, having suffered only some abrasion of 
the procnemial crest ; in two others the full length has been 
preserved, but they are considerably crushed and distorted. In 
four it has been possible to restore the whole length of the shaft, 
but the processes of the upper extremity are absent. The 
remainder, sixteen in number, are represented only by the lower 
end, usually in good condition, with more or less of the shaft. 
The ento-condylar surface (PI. iv., fig. 5, JC) is suboval and 
nearly flat in its longer axis, which is directed obliquely from 
behind forwards and inwards. In the shorter axis it is slightly 
concave. | 
The ecto-condyle (PI. iv., fig. 5, # C) is smaller in size, markedly 
convex, and oval, with its longer axis nearly at right angles to 
that of the entocondyle. An ill-defined intercondyiar channel, 
scarcely to be distinguished in the figure, separates these two 
surfaces posteriorly and follows the contour of the ecto-condyle in 
a direction forwards and outwards to the ecto-cnemial cavity. 
(Pl. iv., fig. 5, ¥). There is a prominent smooth intercondylar 
eminence (PI. iv., fig. 5, 4) the inner slope of which forms part 
of the entocondylar surface. The eminence also bounds the inter- 
condylar channel in front and, in part, the cnemial or rotular 
channel (B) posteriorly. The posterier margin of both articular 
surfaces overhang the shaft considerably. 
In front of the cnemial channel, which is wide and shallow, 
the massive cnemial process (Pl. iv., figs. 1, 3, 4, 5) rises tonearly - 
three inches, measured vertically, above the level of the articular 
surface, this great height of the process being contributed to by the 
extension of the upper end of the procnemial ridge above the 
level of the epicnemial crest (PI. iv., figs. 1, 3, 4 “). The pro- 
cnemial ridge is thick at its upper part, but soon narrows as it 
descends to a much laterally compressed crest (PI. iv., figs. 1, 3, 5, 
fF’), which, even in its somewhat damaged condition, is very promi- 
nent; this is continued down the front of the shaft to a point 
nearly six inches below its summit. About this point the crest 
subsides to a low, but still well marked, ridge, which is continued 
obliquely downwards and inwards till it almost reaches the inner 
margin of the anterior surface of the shaft at a little below the 
middle of the bone (fig. 1, A X). From this level the ridge extends 
vertically downwards for about four inches, but with diminished 
prominence, lying just external and parallel to the inner margin 
of the front surface of the shaft. Finally the ridge acquires 
increased prominence, inclines outwards and eventually becomes 
continuous with the inner border of the supracondylar extensor 
groove (figs. 1, 6, L). 
The epicnemial crest (using the term to include the whole 
upper border of the cnemial process, exclusive of the procnemial 
