‘MOORE—-AUSTRALIAN MESOZOIC GEOLOGY, - 253 
Two examples are in the Australian collection, both of which are 
from Wollumbilla. 
45, Moprona unica, sp.n. Pl. XIII. fig. 5. 
_ Shell small, smooth, obtuse, convex, thickest at the umbones ; um- 
bones subterminal; hinge-line straight ; anterior side produced and 
rounded; dorsal surface with a few flattened concentric striw, 
which are decussated by very faint longitudinal lines. This little 
inflated shell is the only example TI have seen of the genus. 
It is from Wollumbilla. 
46. Mya Maccoyr, sp.n. Pl. XIII. fig. 8. 
Shell ovately oblong, moderately large, tumid, inequivalve; um- 
bones anterior, incurved, close ; anterior margin truncated, angular ; 
posterior end attenuated, rounded, widely gaping; ventral margin 
slightly rounded ; surface of the shell with wide irregular lines of 
growth, the outer surface of the test where best preserved showing 
it to be very wrinkled. It is 33 inches broad by 22 in height.. 
I have only seen one specimen of this species, which has come 
from a deposit of dark blue limestone. It comes from between the 
Amby and Maranoa rivers. Itis named after Professor M‘Coy, who 
has been for some time engaged in the geological survey of Victoria. 
47, Pawopma ruGosa, sp.n. PI. XIII. fig. 7. 
Shell transverse, ovate, inequilateral, inflated, thickest and_broad- 
est on the antericr side ; umbones acute ; hinge-line prominent, with 
a raised ridge for ligamental attachment; anterior margin rounded 
and slightly gaping; from the umbo on the upper dorsal margin to 
the posterior side gradually gaping; surface of the shell with irre- 
gular concentric lines, with an external wrinkled shell-structure. 
Only one example of this shell is in the collection. It measures 
4% inches in breadth by 23 inches in height. 
It comes from the Bungeeworgorai Creek, twenty miles south- 
east from Mount Abundance. 
From the parasitic attachments on the interiors of many of the 
Australian specimens, they appear to have been dead shells. Two 
examples of casts produced by the attachment of Cirripedia are to 
be seen on the interior of this Panopea. 
48, Mvactrus Sanrorpi, sp. n. Pl. XIII. fig. 9. 
Shell elongate, flattened ; umbones rather anterior, close ; anterior 
side slightly produced and rounded, posterior side lengthened and 
attenuated; front dorsal margin slightly curving, with the edges of 
the valves close; both ends slightly gaping. 
This shell approaches very closely to WM. calceiformis of the Infe- 
rior Oolite. 
Several specimens of this shell are in the Western Australian 
collection. It appears to be from the Inferior Oolite. It is named 
after W. A. Sanford, Esq., F.G.S., to whom I am indebted for the 
Western-Australian specimens. 
