91 
of the femur, the greater robustness of the bone in this the least robust of the genus, 
the much higher trochanter, the much wider distal extremity, and especially the wider 
and shallower cavity for the patella. From the equality of size of this femur with that 
of the Emeu, the species which it indicates may be termed Dinornis dromcoides. 

Pelvis. (Plates XIX, XX. & XX a,) 
The first portion of the pelvis here described consists of twelve anterior anchylosed 
vertebree of the sacrum, with a portion of the right iliam and acetabulum (PI. XIX. 
fig.1.). Of the size of this fine fragment an idea will be given by the subjoined table of 
its dimensions, compared with those in a full-sized Ostrich. 
Dinornis,p\. — Struthio. 
In. Lin. In. Lin, 
Height of the first sacral vertebra . . . eo ee 4 6 
Breadth of the articular surface of the body af ditto rate MALT 1 8 
Breadth of the seventh sacral vertebra . . . .. .3 8 L-3 
Length of the first seven sacral vertebre . . . . . . 6 6 6 9 
The last admeasurement shows that the anterior part of the sacrum, including the 
first series of vertebrz provided with double transverse processes on each side!, is 
shorter in proportion to its height and breadth compared with the Ostrich ; and these 
proportions are shown to characterize the entire pelvis by the smaller specimen, subse- 
quently to be described. The under surfaces of the first seven vertebre are flattened, 
and form a smooth and slightly concave platform in the remaining four. The inferior 
transverse processes pass out horizontally to the lower border of the ilium, which de- 
scends to the level of the under surface of the bodies of the sacral vertebrae. In the 
Ostrich they ascend obliquely upwards to join the upper transverse processes, before 
abutting against the lower border of the ilium, which does not descend so low as the 
bodies of the vertebra. 
In the Ostrich the first two inferior transverse processes of the sacrum retain their 
primitive condition of detached ribs, and three transverse processes succeed them before 
the commencement of the os pubis. In the great Dinornis the second sacral rib is an- 
chylosed as a transverse process, and four other processes succeed this before the one 
which abuts against the beginning of the pubis: this is much thicker and stronger than 
the preceding ones, and it is succeeded by four confluent sacral vertebrae, which have no 
lower transverse processes. In the Ostrich the transverse processes of the sixth sacral 
vertebra abut against the part of the innominatum from which the pubis is continued, 
and the transverse processes of the four succeeding vertebre abut against the origin of 
the ischium, parallel with the lower part of the acetabulum ; then a single vertebra with- 
out a lower transverse process or sacral rib intervenes before these are again developed, 
to abut against the posterior part of the acetabulum. 
! See description of the sacrum in Birds, in the * Cyclopedia of Anatomy,’ art, Avs, p, 271, 
N2 
re Pi 
