PROFESSOR OWEN ON THE GENUS DINORNIS. 143 
materials at my command for the restoration of this instructive part of the skeleton of 
that species. , 
The portion of skull referred by Dr. Gustav Jaeger to Dinornis (Palapteryx) ingens, 
in the above-cited work (4to, p. 307, Taf. 25, 26), consists of the cranial part only, 
wanting both upper and lower mandibles. The locality where the specimen was dis- 
covered is not noted; it is stated to have formed part of the rich collection of remains 
of Dinornis obtained by Dr. v. Hochstetter during the stay of the Expedition of the 
Imperial Austrian frigate ‘ Novara’ at New Zealand’. 
Dr. Hochstetter, however, was so fortunate as to have presented to him the parts of 
the skeleton of one individual Moa, determined by proportions of the leg-bones to be 
Dinornis ingens, which had been discovered in a limestone cavern on the right bank of 
the Aorere River, in the Province of Nelson, New Zealand, in which, with the cranium, 
were the two tympanic bones (‘“ Quadratknochen”’) and both upper and lower jaws. 
Unfortunately no other figure of this skull is given, save that (much reduced in size, as 
seen obliquely from below) in the plate of the restored skeleton. It shows, however, 
as may be seen in the copy added to Pl. XV. (fig. 4) of the present Memoir, the main 
characteristic distinctions of the skull of Dinornis ingens given in Trans. Zool. Soe. 
vol. iv. pl. 25, viz. the wide temporal fossee, the long rostral portion of the premaxillary, 
and the extent of the prenarial septum. Further conformity is shown by the following 
admeasurements :— 
Dinornis ingens*. ‘ Novara’ specimen’. 
in. lines. in, lines. 
Breadth of the cranium across the mastoid.............+-- 3 8 3 8 
Breadth of the lower end of paroccipitals ................ 2 10 3 0 
Breadth of the lower end of postorbitals..............-+4. 4 0 4 2 
Antero-posterior diameter of temporal fossa ........++.+-- 1 6 1 6 
Antero-posterior diameter of posttemporal division of tem- 
OLE OSSAD Ueclacsiei sy sfeictel ee cise s. «oe = eres tie eeereer omeaetonenets or 0 53 0 6 
Breadth of intertemporal tract .........0--+- seen ee eres 1 8 1 9 
I have found no such degree of conformity between skulls of distinct species of 
Dinornis as is here exemplified. 
The length, of “about eight inches,” assigned to the entire skull of Dinornis ingens 
(p. 61, Zool. Trans. vol. iv.) was estimated on the supposition that the nasal process of 
the premaxillary (pl. 23, 22’) had lost more from its free end than I now know to have 
been the case; that described skull would not be more than from two to four lines 
longer than the more perfect specimen figured in PI. XV. The superoccipital transverse 
ridge (ib. fig. 2, d, 2) shows two curves on each side the vertical ridge (3), the outer one 
1 “Unter der reichen Sammlung yon Mou-Resten, welche Professor Dr. y. Hochstetter bei Gelegenheit der 
Expedition der k. k. dsterreichischen Fregatte Novara aus Neu-Seeland nach Wien brachte, befindet sich ein 
Schidel,” &e., p. 307. 
2 Trans. Zool. Soc. vol. iy. pl. 23, and vol. vii. p. 142, pl. 15. 
3 «Noyara’ Expedition, Abth. Palwontologie, Taf. xxv. xxvi. (Dr. G. Jaeger’s specimen). 
