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Show 48 MR. G. F. ANGAS ON NEW AUSTRALIAN SHELLS. [Jail. 14, peristome white, margins converging and united by a slight callus, the ri°*ht margin thin, the basal arcuate and thickened. Diam. maj. llj}, min. 10-J, alt. 5% lines. Hab. New Georgia, on trees. HELIX (? PLECTOTROPIS) HOWARDI, n. s. (Plate II. fig. 9.) Shell deeply umbilicated, lenticular, moderately solid, obliquely irregularly striated, and, beneath the lens, very finely granulated, yellowish horn-colour with two indistinct chestnut bands ; spire depressed, apex obtuse ; whorls 4\, rather convex, the last a little descending, acutely keeled, slightly convex at the base, which is without bands; aperture narrowly ovate ; peristome white tinged with brown at the junction of the margins with the body-whorl, margins converging and united by a callus, the right margin slightly expanded, the basal one expanded and reflexed. Diam. maj. 11, min. 9, alt. 4 lines. Hab. Arrowie, 450 miles north of Adelaide, South Australia. MINOLIA PULCHERRIMA, n. s. (Plate IL fig. 10.) Shell depressedly conical, rather solid, transversely finely ridged with two or three broader ridges forming keels, the interstices crossed everywhere with very fine close-set oblique strise, pinkish or yellowish white stained on the body-whorl with bright rose, and spotted on the keels with deep purple lake ; whorls six, angularly convex, sutures broadly and flatly channelled, last whorl tricarinate, white, and rounded beneath ; umbilicus wide, perspective, crenate within ; aperture circular, pearly inside; peristome continuous, margins thin, simple. Diam. maj. 4, min. 2>\, alt. 2\ lines. Hab. Brisbane Water, N e w South Wales (Brazier). MINOLIA BELLULA, n. s. (Plate II. fig. 11.) Shell somewhat globosely conical, rather solid, polished, obscurely obliquely striated, and very finely spirally ridged, pale straw-colour, ornamented with a series of close-set serpentine descending rose-coloured flames on each whorl, ceasing on the last whorl at the periphery ; whorls 6\, flatly convex, sutures flatly excavated, channelled, and narrowly margined, last whorl obtusely angled at the peripherv, somewhat rounded at the base, which is silvery white; umbilicus deep, profound, and perspective, surrounded by a crenulated keel, from which faint striae radiate towards the periphery ; aperture circular, pearly within; peristome simple, margins not continuous, but strongly converging. Diam. maj. 5, min. 4, alt. 4 lines. Hab. Brisbane Water, N e w South Wales (Brazier). THRACIA SPECIOSA, n. s. (Plate II. fig. 12.) Shell elongately ovate, thin, white, rather compressed, very inequilateral, beaks posterior, irregularly concentrically striated, beyond the |