183 
Genyornis differs also from that of these birds in the presence of 
alarge pneumatic foramen at the topmost part of the posterior 
surface of the upper expansion of the shaft. In this respect it 
resembles the femur of the emeu and ostrich, while it differs 
from that of the cassowary. Great differences are also observed 
in the shape and proportions of the great trochanter. 
The inferior extremity is also characterised by its great 
breadth and, in conformity thereto, the width of the inter- 
condylar groove in the largest examples exceeds by an inch that 
of the femur of D. giganteus, Owen.’”* 
From the femur of Dromornis that of Genyornis is dis- 
tinguished by its more massive proportions as shown in table 
I., and by some of the above mentioned characters, such as 
the shape of the section of the shaft (which in Dromornis 1s a 
flattened and regular oval) ; the marked curvature of the internal 
border; the presence of the pneumatic foramen and the shape and 
projections of the trochanter with its accessory processes. In 
one respect there is a resemblance to Dromornis, viz., in the 
gradual and even slope upwards of the superior articular surface 
towards the trochanter. So far as the mutilated condition of 
the Dromornis femur permits a comparison to be made there are 
also considerable differences in the details of the inferior extremity 
—particularly in respect of the contrast between the oblique, deep 
and narrow popliteal depression in this bone and the wider, 
shallower, and much less well defined cavity as it exists in 
Genyornis. 
Whether further remains of the bird to which the fragment of 
femur, named Dinornis queenslandie by Mr. DeVis, belongs 
shall prove it undoubtedly to be an undoubted Dinornis or not, 
the sudden ascent of the trochanteric part of the articular 
surface of this bone in the Moas is in marked contrast to the 
feature that has been described for Genyornis. A further dis- 
tinction in D. queenslandie is the considerable fore and aft pro- 
jection of the trochanter which, in a smaller bone, gives a greater 
width of the postero-external trochanteric surface than in the 
larger femur of Genyornis. 
*The South Australian Museum does not possess a femur of D. maximus. 
