8 ANNALS OF THE QUEENSLAND MUSEUM, No. 6 
is carried to the edge of the probrachialis area. This, in the fossil, 
is more pronounced, and on reaching the area curves suddenly 
proximad and vanishes. It is the feature to which reference has 
been made. The popliteal fossa is shallow, but the probrachialis 
area is deeper and more clearly defined than in the recent species ; 
its surface is rough, but not longitudinally striated. On the 
postaxial surface the sulci for the extensor tendons are also 
deeper and better defined. The length of the fossil is 61.5 mm., 
the breadth of the sha,ft is 5.5 mm. at the narrowest, of the distal 
end, 14.5 mm. Locality, Lower Cooper. Loc. 6. 
FAMILY COLUMBIA. 
Leucosarcia prcevisa n.s. 
Humerus. — Proximal half of a bone of the right side minus 
a part of the internal and of the external tuberosities 
(Plate I., fig 5a). This portion of the pigeon wing is 
recognised at once by the shallowness of the subtrochanteric 
fossa (6), and by the short, blunt, and triangular external 
tuberosity (a). The fossil is in generic agreement with 
Leucosarcia, but represents a more delicately formed species.. 
Its capitum is proportionately smaller, and its shaft comparatively 
much attenuated, but its sulcus transversus (d) is considerably 
deeper, its incisura capitis (e) wider, and the cribriform plate 
of its subtrochanteric fossa is pierced by more numerous and larger 
foramina. These seem to be sufficient differences to warrant 
specific distinction. Locality, Wurdulumankula. 
ORDER LIMICOL^. 
OCYPLANUS n.g. 
0. prceses n.s. 
Tarsometatarsus. — Plate I., fig. 5b., represents the distal end 
with a part of the shaft of a right tarsometatarsus. The 
leading discriminative characters of this bone are, first, the absence 
of any trace upon the shaft of a first metatarse ; second, a great 
inequality in the prolongation of the free ends of the metatarsals. 
From this combination of features it results that the great majority 
of the families of Australian birds are withdrawn from consideration. 
In brief, we are reduced by it to compare with the fossil the following 
only— the ducks, grebes, and certain of the Limicolce. The ducks 
are in general agreement, but have the metatarse commonly short 
and strong ; in no case are its proportions like those of the fossil ; 
it is impossible to obtain the metatarsal index of the latter, but it 
is evident from the fragment of it preserved that the length and 
slenderness of the entire Done would deny its derivation from a duck.. 
