184 
RECORDS OF THE AUSTRALIAN MUSEUM. 
Log. and Hor. — Railway Cutting at Farley, near West Maitland 
— Lower Marine Series; h Wollongong, Illawarra District, and ? 
Richmond Yale, as above — Upper Marine Series. 
Stutchburia obliqua, sp. nov . 
(PI. xxxi., fig. 3.) 
Sp. Char. — Shell transversely obliquely oblong, slightly modioli- 
form ; length two to two and a quarter inches, depth one and one- 
eighth to one and a quarter inches ; valves moderately convex, 
narrowing anteriorly, and expanding to some extent posteriorly; 
dorsal and ventral margins sub-parallel, the former straight, but 
not as long as the shell, the latter with slight inflections anterior 
to the greatest convexity of the valves ; anterior ends remarkably 
small, the margins obliquely rounded, posterior ends becoming 
flattened, the margins obliquely rounded above and below; greatest 
convexity anterior to the valve centres, with ill-defined cinctures 
from the umbones, which are almost terminal; ligamental fulcral 
grooves well marked ; anterior adductor scars small, somewhat 
triangular and immediately beneath the umbones, with slightly 
thickened posterior margins, posterior adductor scars inconspicuous; 
sculpture consisting of well marked close concentric laminse, 
arranged in broad growth zones, crossed by radiating costa? (six 
in one example, ten in another), all posterior to the shallow cinc- 
tures, and widening from one another on and above the diagonal 
ridges, with a generally roughened surface. 
Obs. — This species differs from all the foregoing forms in its 
obliquity, and somewhat modioliform outline. It resembles S. 
costata in the presence of the posterior radiating costie, but the 
two cannot otherwise be mistaken for one another. It is a com- 
paratively much broader species than either S. simplex or S. 
farleyensis. It is known to me both in the testiferous condition, 
and as an internal cast, the former being in the collection of the 
Geological Survey, the latter in our own. 
Log. and Hor. — Jervis Bay, Shoalhaven District (cast) — 
Upper Marine Series; Farley (testiferous) — Lower Marine 
Series. 
Genus Pleurophorus, King, 1844. 
(Ann. Mag. Nat. Hist., (1), xiv,, 1844, p. 313,) 
Obs. — Notwithstanding the fact that the shells referred to this 
genus by De Koninek and myself do not fall within its limits, we 
still have, I believe, a true and undescribed Pleurophorns in our 
Permo-Carboniferous rocks. It occurs commonly at Farley with 
Stutchburia farleyensis , and is often mistaken for it, a little 
examination, however, will at once enable the difference between 
the two to be detected. 
