18 ANNALS OF THE QUEENSLAND MUSEUM, No. 6 
Apart from these varying proportions, there does not seem to 
be more than one remarkable difference between the extinct and 
living Darters. The interorbital depression of the frontals is in 
the fossil a well-marked groove extending caudad beyond the 
middle of the cranium. Also the presphenoid rostrum is higher 
and much stronger than it is in the recent bird. (Plate VI., fig. la). 
As this cranium is in all its dimensions somewhat larger than 
that of P. novcehollandioe, it prohibits us referring it to the small 
species previously described P. parvus. Locality, Lower Cooper. 
Pelvis. — Plate VI., fig. 2A, B. — This is from the pelvis of a 
Plotus, but it is quite uncertain whether it came from the species 
abovenamed or from P. parvus, or from any other species. The 
only thing that can be said on the point is that it is not from a 
pelvis of P. novoehollandioe. As will be seen from the figure, the 
fossil is little more than the prseacetabular vertebrae, with 
remains of the interacetabular part of the ileum, and deprived 
of its hypapophysial foramina. Locality, Lower Cooper. 
Phalacrocorax gregorii n.s. 
Prem axillary. — Plate V.. figs. 6 A, B. — Entire from tip to the 
nasofrontal suture. Its length to the nasofrontal joint is 80 mm., its 
width at the joint, 17 mm. The nearest approach to this mandible is 
found in P. carbo, which has a length of 68 mm., with the same 
width of 17 mm. There is nothing in the fossil to prove its specific 
distinction from P. carbo, except that it is longer in proportion to 
its breadth, and this, in the bill of such a bird, is an insufficient 
trait. Its non-identity with the living cormorant of southern 
waters depends on that of the numerous bones associated with it. 
Locality, (?). Collected by H. Y. L. Brown, Esq., Government 
Geologist. 
Coracoid. — Plate VII., fig. 1 A, B.— Proximal half of right 
coracoid, minus the summit of the acromium. This is in size 
about the same as in P. carbo, but conspicuously differs from the 
recent bone in the size and form of the facets for the humerus and 
the scapula, the last especially. This is a deep cup-shaped cavity, 
occupying the whole of the articular surface of the precoracoid pro- 
cess. The pad for the head of the humerus is quite differently pro- 
portioned, being much broader, though not greatly longer, than in P. 
carbo. In the recent bone there is an inframarginal groove from the 
proximal end of the humeral pad to the tip of the acromium on its 
outer surface, this in the fossil is a low ridge running proximad 
further from the edge. The shaft just below the scapular articulation 
(Fig. A,d.) is thicker and natter than in recent Cormorants. Local- 
ity, Wankameminna. 
To this proximal half may probably be added a distal two- 
thirds of the same side largely defective at its outer angle and 
rather slenderer in the shaft (fig. B.) Its generic status is made 
