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Show 1873.] LAND AND MARINE SHELLS. 183 3. HELIX (TROCHOMORPHA) JUANITA, n. sp. (Plate XX. fig. 3.) Shell widely and deeply umbilicated, depressedly conoidal, moderately thin, shining, obliquely sculptured with irregular close raised striae, dark chestnut-brown, with a narrow yellowish-green band at the periphery and a broad band of the same colour surrounding and including the umbilicus ; spire convexly conoidal; whorls 6\, slightly convex, the last angled at the periphery; aperture oblique, truncately oval; peristome white, the margins thin, converging, slightly expanded, the right somewhat flexuous, the basal a little thickened. Maj. diam. 12, min. 11 ; height 6^ lines. Hab. Solomon Isles. 4. HELIX (ANGASELLA) PHILLIPSIANA, n. sp. (Plate XX. fig. 4.) Shell deeply umbilicated, depressed, rather thin, obliquely plicately striated and finely granulated, brownish white ; spire slightly raised ; whorls 4\, convex, the last rounded, descending in front, a little constricted behind the lip ; aperture diagonal, subcircular ; peristome nearly continuous, expanded, and slightly reflexed, the margins united by a thick callus. Maj. diam. 6|, min. diam. 5\; alt. 3\ lines. Hab. Neighbourhood of Arrowie, interior of South Australia. This species is related to H. cyrtopleura, Pfr., from the same locality ; but it is smaller, has a narrower umbilicus, is less discoidal, and the surface is granular, besides being plicately sculptured. 5. PECTUNCULUS GEALEI, n. sp. (Plate XX. fig. 5.) Shell solid, triangularly ovate, ventricose, equilateral, pale yellowish brown, mottled here and there with reddish brown; valves radiately and strongly ribbed ; ribs rounded, transversely striate, and towards the base imbricately nodulous, the interstices excavated and transversely striated; umboes central, tumid, and a little incurved; cardinal area deep and somewhat triangular; posterior side rather straight; anterior side subangulate, with a distinct lunular area, ou which the sculptured ribs are smaller and less prominent; ventral margin strongly arcuate, dentate within; posterior adductor scar supported by a prominent thickened callosity ; interior white. Long. 18, alt. 18, lat. 14 lines. Hab. Dredged off Port Macquarie, N e w South Wales. This remarkable shell bears a strong external resemblance to certain species of Cardium, owing to the imbricately nodulous character of the ribs, and to its possessing a defined lunular area. 6. LIMOPSIS LORINGI, n. sp. (Plate XX. fig. 6.) Shell very solid, triangularly orbicular, equilateral, somewhat tumid, white, more or less tinged with rose-colour; valves concentrically ridged, the ridges closely striate, furnished next the margins with a pale brown epidermis projecting in a fringe beyond them ; umboes central, prominent, and approximating; dorsal margin on |