389 
RESTORATION 
OF 
DINORNIS GRAVIS. 
In preceding Memoirs the characters of a species of Dinornis distinct from those at 
that date determined were deduced from the skull (p. 280, Pl. LXXXI.) and prin- 
cipal bones of the hind limb (p. 347, Pls. XLI. XLIL.). 
Subsequent discoveries of answerable bones in other localities have exemplified 
repetitions, not to say constancy, of the differential characters above pointed out; and 
in the Glenmark Swamp these bones were found associated with so large a proportion 
of the skeleton, as to permit that framework of the extinct bird to be articulated. 
From the specimens above alluded to, aided by photographs of the articulated skeleton 
kindly transmitted to me by Dr. von Haast, F.R.S., and reproduced in Plate CX., 
I am enabled in the present section to supplement my former evidences of the species. 
As regards the free and movable vertebra, or those between the skull and pelvis, 
the numerical formula of Dinornis gravis is that of the genus, viz. 15 cervical, 7 dorsal ; 
and of the latter, the hamapophyses (sternal ribs) of the second and third dorsals join 
directly their coalesced spines. ‘This mass, called ‘ sternum,’ shows the dinornithic 
characters of the bone—the straight anterior border between the costal processes, the 
short costal tract, the small and ill-defined coracoid depressions, the pair of deep 
and wide hind notches, with the smaller median notch. In the costal tract two ridges 
for articulation with sternal ribs divide the intercostal depressions. ‘The parts of the 
sternum circumscribing externally the hind notches, which boundaries represent the 
backward continuation of the outer marginal portions of the body of the sternum, are 
reduced by the extent of the unossified portions of the body of the bone to the character 
of processes, and are defined as ‘ lateral processes * in preceding Memoirs. ‘These in 
Dinornis gravis are more slender in proportion to their length than in Dinornis 
robustus, but less so than in Dinornis rheides ; in this respect, as in their degree of 
They are homologized with the xiphoid appendage of the mammalian sternum by Prof. Miyart, and termed 
by him the ‘ lateral xiphoid processes’ in his Memoir on the axial skeleton of the Ostrich, Trans. Zool. Soc, 
vol. viii. p. 447. 
3 .P 
