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Show 38 MR G. F. ANGAS ON N E W MARINE SHELLS. [Jan. 16, CLATHURELLA RUFOZONATA, n. sp. (Plate V. fig. 13.) Shell fusiformly turreted, solid, white, sometimes with a zone of double interrupted chestnut lines near the base of the last whorl, similar chestnut markings being occasionally apparent here and there near the upper portion of the whorls; whorls 6, convex, longitudinally ribbed and crossed with transverse ridges that become sharply and prominently nodulous upon the ribs ; spire sharp, apex light brown; aperture narrowly quadrate ; outer lip varicose and denticulated ; posterior sinus moderate. Length 2\ lines, breadth 1 line. Hab. "Bottle and Glass" rocks, Port Jackson (Brazier). A pretty little white species presenting a more or less beaded appearance all over, sometimes marked with interrupted transverse chestnut lines. CLATHURELLA PUSTULATA, n. sp. (Plate V. fig. 14.) Shell fusiformly turreted, moderately solid, white, irregularly longitudinally flamed with brown on the upper whorls, with two broad brown bands on the last whorl; whorls 6, convex, longitudinally costate, with about 10 rounded ribs, encircled by about the same number of narrow prominent ridges that become slightly nodulous at the intersections, the interstices showing, under the lens, very faint descending striae; the lower portion of the basal whorl and the pillar strongly granulated ; spire sharp; aperture elongately ovate ; outer lip thickened and varied behind, dentate within ; columella nearly straight above, slightly sinuous below ; canal short and open; posterior sinus broad and shallow. Length 3g lines, breadth 1^ line. Hab. Port Jackson (Brazier). This species, which is prettily variegated with ash-brown, may be at once recognized by the stout granules at the base of the pillar. CLATHURELLA MODESTA, sp. nov. (Plate V. fig. 15.) Shell fusiformly turreted, solid, fulvous brown; whorls b\, convex, stoutly and distantly longitudinally ribbed, and crossed with prominent erect ridges becoming sharply nodulous at the intersection ; spire sharp; aperture narrowly ovate; outer lip somewhat flattened and thickened, strongly dentate within ; columella a little sinuous, with a few small granulations at the base of the whorl; posterior sinus rather broad. Alt. 2^ lines, diam. 1 line. Hab. Port Jackson (Brazier). Genus CIRSONELLA, Angas. Shell minute, globosely turbinate, smooth, narrowly umbilicated ; aperture circular; peritreme continuous, slightly thickened. CIRSONELLA AUSTRALIS, n. sp. (Plate V. fig. 16.) Shell globosely turbinate, narrowly umbilicate, semiopaque, smooth, |