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Show 112 MR. G. F. ANGAS ON NEW AUSTRALIAN SHELLS. [Jail. 24, it 9. T U R B O N I L L A NITIDA, n. s. (Pl. XIII. fig. 9.) Shell sharply subulate, turreted, rather thin, white, shining; whorls thirteen, slightly convex, longitudinally prominently rather broadly ribbed, interstices smooth, narrow, ribs abruptly ceasing at the periphery of the last whorl; sutures impressed ; aperture small, subquadrate ; columella straight; outer lip thin, a little produced in front. Length 5 lines, breadth 1 line. Dredged in Port Jackson (Coll. Angas). 10. ODOSTOMIA LJSVIS, n. s. (Pl. XIII. fig. 10.) Shell ovately conical, thin, subdiaphanous, shining, white ; whorls seven, a little rounded, last whorl not quite half the length of the shell; sutures channelled ; aperture oblong-ovate, a little produced anteriorly; columella fold transverse and strongly developed ; outer lip thin, acute, simple. Length 3^ lines, breadth 1^ line. Dredged in deep water in Port Jackson (Coll. Angas). 11. ODOSTOMIA LACTEA, n. s. (Pl. XIII. fig. 11.) Shell elongate, rather thin, smooth, white, shining ; whorls six, flattened ; sutures impressed ; aperture small, ovate, somewhat produced anteriorly, one-third the length of the shell; columella-fold strong and a little oblique ; outer lip thin, simple. Length 3 lines, breadth 1 line. Dredged in deep water, Port Jackson (Coll. Angas). 12. ODOSTOMIA (PARTHENIA) PASCOEI, n. s. (Pl. XIII. fig. 12.) Shell ovately conical, rather thin, rimate, pale yellowish brown; whorls seven, longitudinally rather closely plicate, plicae evanescent on the basal portion of the last whorl, transversely finely striated; whorls eight, somewhat convex, last whorl rather ventricose ; sutures distinct; aperture ovate ; columella-plait moderate, transverse, situated a little within the aperture ; outer lip rounded, simple. Length 4 lines, breadth 1| line. Dredged in deep water, Port Jackson (Coll. Angas). 13. ODOSTOMIA (PARTHENIA) KREFFTI, n. s. (Pl. XIII. fig. 13.) Shell fusiformly turreted, moderately solid, very narrowly rimate, white ; whorls nine, strongly and closely longitudinally plicate, plicae rounded, scarcely evanescent at the base of the last whorl, very finely transversely striated, last whorl moderate ; sutures channelled ; aperture small, ovate ; columella-plait transverse, rather conspicuous. Length '3\ lines, breadth 1 line. Port Jackson, deep water (Coll. Angas). 14. STYLOPTYGMA AURANTIACA, n. s. (Pl. XIII. fig. 14.) Shell acutely elongate, rather thin, shining, fulvous orange, with a pale band next below the sutures, darker on the lower whorls, fading into white on the upper whorls, which are glossy and sub-transparent ; spire turreted; whorls eight, very slightly convex, |
