ANNALS OF THE QUEENSLAND MUSEUM, No. G 1) 
Moreover, the vascular perforation near the end of the bone is, in 
the ducks, situated between the bases of the pedicels of the second 
and third trochleas, the bridge between the pedicels being very 
short, whereas the perforation is, in the fossil, at a great 
distance from the free ends. The same two objections apply to the 
grebes, but the latter of them with less force, since the perforation 
is in them not so far distad as in the ducks. We first meet in the 
Limicolce with bones similarly conditioned to the fossil as to structure 
and proportions, but not as to size. The breadth of the fossil 
across the trochleas is 12.5 mm., of the shaft, 5 mm. ; in the Stone 
Plover the former is 11.5 mm., of the shaft at the same point, 4. 
Burhinus approaches it then most nearly in size, but in form 
is quite different. The shaft of the fossil expands gradually to its 
greatest trochlear width ; in Burhinus the trochlear expansion 
is sudden. There is. in fact, no genus of the Limicolce known 
to the writer into which this metatarse can be admitted. It 
therefore becomes a question whether to designate it Gen. et sp. ind., 
or to give it a name. Yielding to the persuasion that the latter 
course will be more convenient to students of the subject, the writer 
proposes for the bird the names given above. 
FAMILY CICONIIDiE. 
Xenorhynchus nanus de Vis. 
Tibia. — The distal fifth or less of the right tibia. Unfortun- 
ately this second example of the tibia adds nothing to our informa- 
tion about this smaller Jabiru than that it attained a rather larger 
size than the tibia already described warranted us in attributing 
to it. In that bone the greatest width across the trochleas was 
14 mm., in the present one it is 15 mm., and all the parts of the 
bone are proportionately larger. It is not thought at all necessary 
to give a figure of it. Locality, Wurdulumankula. 
Xenorhynchopsis n.g. 
The differentiating features which seem to demand the separa- 
tion of this genus from Xenorhynchus consist, — (i.), in a peculiar 
addition to the tuber which at the distal end of the tibia increases 
the articulating surface of the fossa for the reception of the inter- 
condylar process of the tarsometatarsus. The tuber itself (Plate I., 
fig. 6 A, B, C) is much as in Xenorhynchus, but proximad of 
it rises a short thick' subpyrif or m tubercla (fig. A. (a), which, as it 
were, forms a buttress to the base of the tuber ; — (ii.) of a 
different form of the condylar surface viewed end on (fig. B.) ; 
that of the new genus being shorter in proportion to its 
breadth, and having its inner trochlea (fig. B (a) relatively much 
smaller than and more remote from the outer ; — (hi.) in the scar 
on the outer surface of the shaft near the malleolus in Xenorhyn- 
