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Show 1867.] MR. G. F. ANGAS ON NEW AUSTRALIAN SHELLS. Ill the ridges on the last whorl alternately larger and smaller, crossed by very fine longitudinal lines ; spire elevated ; whorls eight, slightly rounded; aperture rather more than half the length of the shell, narrow ; columella three-plaited, the upper plait the largest; outer lip thin. Length 7 lines, diam. 2^ lines. Dredged in Middle Harbour, Port Jackson (Coll. Angas). Several specimens of this pretty little Mitra were also obtained at Moreton Bay by the late Frederick Strange, to whose memory I have dedicated it. 5. COLUMBELLA (MITRELLA) ALBOMACULATA, n. s. (Pl. XIII. fig. 5.) Shell elongately fusiform, rather solid, whitish, tinged with violet; lower portion of the whorls faintly reticulated with chestnut, with broad brown flames, thickly spotted with white below the sutures ; whorls eight, flattened, basal whorl spirally ridged anteriorly; aperture rather narrow, two-fifths the entire length of the shell; columella arcuated, callous, transversely finely ridged in front; outer lip sinuated posteriorly, edge thin, thickened exteriorly, and dentated within. Length 5\ lines, breadth 2 lines. Under stones at low water, Port Jackson.(Co 11. Angas). 6. iEsopus FILOSUS, n. s. (Pl. XIII. fig. 6.) Shell elongately fusiform, pale fulvous or brown, with spots of darker brown and white below the sutures; spire acuminately turreted, apex a little obtuse ; whorls eight, slightly convex, transversely finely sulcated throughout, last whorl nearly one-third the length of the shell; aperture moderate, ovate ; columella arched ; outer lip slightly thickened externally and denticulated within. Length 5| lines, breadth 2 lines. Dredged in Port Jackson in 5 fathoms (Coll. Angas). 7. Acus (ABRETIA) BICOLOR, n. s. (Pl. XIII. fig. 7.) Shell subulate, whitish, the lower half of the last whorl chocolate-brown ; whorls nine, nearly straight, more or less nodulous below the sutures, thin, longitudinally ribbed, or very finely striated, the ribs on the last whorl ceasing at the periphery ; columella arcuate ; aperture small, ovately lunar ; outer lip thin, rounded. Length 8 lines, breadth 2 lines. Dredged in Middle Harbour, Port Jackson (Coll. Angas). 8. Acus (ABRETIA) ASSIMILIS, n. s. (Pl. XIII. fig. 8.) Shell elongately fusiform, rather solid, light fulvous, stained at the lower part of the whorls with purplish chocolate ; whorls nine; a little rounded, longitudinally ribbed; ribs rather broad, arcuate, ceasing at the periphery of the last whorl, the interstices here and there irregularly longitudinally striated ; columella arcuate, slightly twisted at the base ; aperture small, contracted towards the front ; outer lip thin, simple. Length 5\ lines, breadth lj line. Dredged in Port Jackson (Coll. Angas). |