385

355

rib, behind which cup is a large pneumatic foramen. The ribs of the seven succeeding
sacrals are anchylosed and short, abutting against and coalescing with the closely
grasping plates of the antacetabular parts of the ilia. The interpleural vacuities of
the eight anterior sacrals rapidly decrease in size to the fifth, and again slightly expand
in the last two. The first three pairs of anchylosed ribs incline forward ; the next three
pairs are transverse ; the last of this series curves slightly backward, commencing that
curve which is carried out by the proximal ends of the ischia. Both ischia and pubes
in the present specimen are broken away from their origins at the acetabulum. The
following are the dimensions of this pelvis :-

in. lin.
Length (fore ends and hind ends of ilia broken off) .................................... 14 0
Breadth (behind acetabulua, where the prominences are abraded .............. 8 6
Height of the first sacral (summit of spine broken off) ................................ 5 0
Breadth of first sacral ............................................................................... 4 0
Diameter of circular orifice of neural canal of first sacral ............................ 0 4
From fore part of first sacral to postacetabular angle of ilium ...................... 9 4
Breadth of "pelvic disk" 1 ........................................................................... 7 0
Vertical diameter of acetabulum ................................................................ 2 3
Length of first eight sacral vertebrae .......................................................... 6 4
Length of last nine sacral vertebrae ............................................................ 7 0

It may be convenient for future comparers of the hind-limb bones of Dinornis to
have, in tabular form, the principal dimensions of the femur, tibia and metatarsus of
the several species at present defined and named. In this table are given references to
the figures of the type specimens affording the dimensions ; and there are added remarks
and dimensions by Dr. Haast, F.R.S., the latter of bones obtained from the swamp of
Glenmark, and which are referable to the above species of Dinornis.

1 Ante, p. 304.