186 
any of the Dinornithide. The Callabonna tibia is, moreover, 
characterised by a very marked inflection of the lower end of the 
shaft, and particularly by the incurvature of its inner border— 
these features being markedly in excess of those which obtain in 
Pachyornis. A very conspicuous feature of the Genyornis tibia 
is the massive proportions of the cnemial process, the elevation 
above the articular surface to which it reaches and the marked 
recurvature of the ecto-cnemial ridge to the extent of forming 
what might be described as a hamular process. In this combina- 
tion of characters there is a much greater resemblance to the 
emeu than to the Dinornithide. 
Tapie, (i. 
Table showing comparative measurements of the Tibio-tarsi 
Genyornis newtoni and Dinornis (Pachyornis ) elephantopus. 
pane 
| Dinornis elephantopus 
Owen. 
Genyornis newtoni. Pachyornis elephanto- 
pus, Lydekker 
= | 
Inches. Mm. Inehes. | Mm. 
Length wks Soop diteeenths ie 24 | 608 
Breadth of proximal end eta alg eee bps haten 
«“  « distal end oe Aa 41 | 105 
Circumference at middle... i. | 164 (Oe |, ioe 
| a" 
The Co yornis tibia balongati to one ve Shc Lae pair of femora 
of the preceding table, and the measurements of that of D. 
elephantopus are from Owen’s table. 
The tarso-metarsus equals in length that of ‘Dinornis imgens, 
Owen, but its latitudinal measurements are superior to the latter, 
in all respects except in that of the width of the distalend. Beyond 
this relative narrowness of the combined trochlez these elements 
are, in Genyornis, distinguished by their inequality of size—the inner 
being only half the width of the outer and very slightly shorter 
and the outer only two-thirds of that of the mid-trochlea. The 
surfaces that bound the trochlear interspaces are markedly 
concave, and there are two perforations through the bone just— 
above the outer trochlear interspace. In these features there is 
a closer resemblance to the emeu than to the cassowary,” in which 
latter there is nearly equality of size between the inner and outer 
trochlee and no perforation in the interspace, while in the 
former there is a single perforation. In general proportions, 
however, there is a nearer approach to the latter bird than to the 
* Casuarius australis. 
