260 MR. BUSK ON THE REMAINS OF 
tions than the shaft; and it appears to have belonged to an older, or at any rate to a 
more robust animal than that whose humerus has been above described. 
7, 8. Ulna. 
Two well-marked portions of the ulna of £. falconeri are contained in the collection, 
one belonging apparently to a younger animal than the other, which from its colour 
and general aspect would appear to appertain to the same individual as the condyloid 
articular extremity represented in fig. 27; whilst the former specimen, fig. 28, in like 
manner agrees in colour and appearance, and probably also in age, with the shaft of the 
humerus represented in fig. 26. But, except in their colour and apparent disparity in 
age, the two specimens exactly resemble each other; and it is very satisfactory to find 
that the peculiar characters shown in them are not limited to a single individual, and con- 
sequently that those characters cannot be regarded as accidental. The specimens are por- 
tions of the upper end of the right and of the left ulna. ‘The longer and more perfect 
fragment is that shown in figs. 28 and 28%. It is about 3'"7 long, from the summit of the 
olecranon, on which is observable a considerable part of the epiphysial surface. The shaft 
is broken irregularly across about 2”:8 below the level of the articular surface, above 
which the olecranon rises about 1:2. The olecranon.is about 1:1 in transverse diameter 
at the base, and its greatest antero-posterior diameter is nearly the same. ‘The trans- 
verse diameter of the head on the level of the articular surface is about 12 or 1:3, 
and the ap. d. at the same level 2’-2. The internal articular facet is 07-95 in its 
widest transverse diameter, and the same in the antero-posterior, measured from the 
anterior border to a line drawn across it at right angles from the bottom of the radial 
sulcus. The radius of the curve of the articular facet in the antero-posterior direction 
is 0-9, and that of the prominent part of the articular surface on the olecranon 0625. 
The anterior surface of the bone is hollowed, as usual, immediately below the notch 
for the attachment of the head of the radius; but this hollow is very circumscribed, 
and immediately below it the surface is flat from side to side, and a little lower down 
convex. ‘Lhe outer surface is concave and quite smooth; the internal, except between 
the articular head and the olecranon, flat, or slightly convex. ‘The internal angle is 
rounded and smooth, and without any fossa; the external very acute, but it does not 
project at all in front. The adjoining figures represent the outlines of a transyerse 
section of the shaft, in fig. 19 at about 2:1, and in fig. 20 at about 2-7 below the 
level of the articular surface at the bottom of the 49 Th 20 
radial notch; and the comparison of these with | ca é 
the outline of a transverse section of the shaft 
of E. melitensis at a rather lower point (p. 246) es es E 
will serve to show how closely in form they all a rf 
resemble each other. In other respects also the 
ulna of EL. falconeri, save in size, appears to agree pe pe 
