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Show 34 MR. G. F. ANGAS ON NEW MARINE SHELLS. [Jan. 16, around the umbilicus; aperture oblique, subquadrate ; outer hp simple ; columella arcuate, slightly thickened and partly expanded over the umbilicus. Diam. maj. 1 inch, min. 10 lin., alt. 6 lin. Hab. Found 30 miles in a N.E. direction from the Burra Mines, South Australia (F. G. Waterhouse). This remarkable species is very similar in the character of its sculpture to H. silveri, Ang.; but the corrugations are less regular, the umbilicus is larger, the shell is flattened, and the last whorl very prominently keeled. 5. Descriptions of two Genera and twenty Species of Marine Shells from New South Wales. By G E O R GE F R E N C H A N G A S , C.M.Z.S., F.L.S., F.R.G.S., &c. [Eeceived January 11, 1877.] (Plate V.) PURPURA (CRONIA) ANOMALA, n. sp. (Plate V. fig. 1.) Shell ovately fusiform, rather solid, ornamented with a brownish-orange band spotted with black encircling the last whorl, and appearing again just above the sutures of the upper whorls, and with irregular undulating longitudinal chestnut lines, strongest near the base of the last whorl; whorls 5, angulated at the upper part, distantly longitudinally ribbed, the ribs stout and rounded and becoming swollen and nodulous above, transversely finely ridged throughout; spire elevated, apex sharp; aperture elongately ovate ; outer lip arcuate ; columella nearly straight, with a moderate callus overlapping the pillar. Length 4\, breadth 2 lines. Hab. Dredged outside Port-Jackson Heads, in 25 fathoms (Brazier). A curious little shell, from deep water, which I have placed provisionally in Messrs. H. and A. Adams's subgenus Cronia,represented by the Purpura amygdala, Kien. Genus MICROVOLUTA, Angas. Shell small, ovately fusiform, solid, smooth, shining; spire as long as the aperture, apex papillary; whorls simple; aperture narrowly ovate ; columella with 4 strong transverse plaits, the anterior |