OCR Text |
Show 174 MR. G. F. ANGAS ON NEW AUSTRALIAN SHELLS. [Mar. 6, cancellated with fine, close-set, thread-like lines; apex of the spire elevately produced. Long. 10, lat. 6 lin. Hab. Dredged at "Sow and Pigs" reef, Port Jackson (Brazier). A very elegant cone, totally distinct in its characters from any other Australian species. BlTTIUM TURRITELLIFORMIS, n. sp. (Plate XXVI. fig. 14.) Shell elongately turreted, rather thin, light yellowish brown, inclining to reddish purple on the upper whorls, transversely finely ridged, the interstices very minutely and closely longitudinally striated, the last whorl keeled below, with the base smooth and slightly concave; whorls 10, convex; sutures impressed; aperture roundly ovate; outer lip simple, arcuate; columella somewhat thickened and twisted towards the base, canal short. Long. 4, lat. 1 lin. Hab. Port Jackson (Brazier). Were it not for the form of the aperture, this shell might easily be mistaken for a little Turritella. ALVANIA ELEGANS, n. sp. (Plate XXVI. fig. 15.) Shell minute, imperforate, scalariform, moderately solid, whitish, regularly cancellated by three transverse (on the last whorl four) and several longitudinal ribs, which become sharply nodulous at the intersections; whorls 5, convex, sutures deeply incised; aperture circular ; lip flattened and variced externally. Long. 1|, lat. \ lin. Hab. Port Jackson. This beautifully sculptured species is from shell-sand. ALVANIA GRACILIS, n. sp. (Plate XXVI. fig. 16.) Shell imperforate, elevatedly turbinate, moderately solid, light purplish brown ; whorls 5, longitudinally ribbed as far as the periphery of the last whorl, and strongly transversely lirate throughout, the intersections producing a regular beaded appearance ; the transverse ridges towards the base strongly defined ; aperture subcircular, peritreme thickened. Length \\, breadth | line. Hab. Port Jackson, from shell-sand (Brazier). TORCULA PARVA, n. sp. (Plate XXVI. fig. 17.) Shell narrowly acuminately turreted, very pale brown, with an indistinct light-chestnut band at the sutures, transverselv very finely ridged, with three rather prominent keels on each whorl"; whorls 1 \, slightly convex; sutures impressed ; aperture subquadrate ; outer lip simple; columella slightly arcuate above, a little thickened and produced at the base. Long. 4\, lat. 1 lin. Hab. Dredged at the "Sow and Pigs" bank, Port Jackson (Brazier). |