OCR Text |
Show 1871.] MR. G. F. ANGAS ON NEW AUSTRALIAN SHELLS. 17 16. RISSOINA CRASSA, n. sp. (Plate I. fig. 16.) Shell pyramidally ovate, thick, whitish, strongly distantly longitudinally plicate; whorls 7 to 8, slightly rounded, suture impressed, the last whorl with a rounded ridge at the base, over which the longitudinal plications are continued; aperture subovate, strongly and obliquely sinuate in front; outer lip sharp, thickly variced behind ; inner lip thickened, sinuous. Length 3^- lines, breadth 1 line. Hab. From the "Bottle and Glass" rocks, under stones, Port Jackson (Brazier). 17. CLATHURELLA IIAYESIANA, n. sp. (Plate I. fig. 17.) Shell ovately fusiform, rather solid, of a dull chalky-grey colour; whorls 7, angulated at the upper part, closely longitudinally ribbed and transversely ridged, forming flattened nodules at the points of intersection; spire sharp, apex purple; aperture elongately ovate, deep purple within ; outer lip finely denticulated at the edge, contracted below ; posterior sinus narrow and rather deep. Length 6 lines, breadth 2\ lines. Hab. Dredged in Lane Cove, Port Jackson, NewS.Wales(l?nmer). This elegant species differs from C. reticosa, A. Ad. & Angas, in having the whorls angulate at the upper part, with the latticed sculpture less nodulous at the crossings; it also wants the band, the channel is more contracted and produced, and the nodose lirse are absent within the outer lip. 18. CLATHURELLA TENUILIRATA, n. sp. (Plate I. fig. 18.) Shell fusiformly turreted, solid, opaque, pale brown; whorls 8, convex, longitudinally ribbed with about eight somewhat compressed prominent ribs, crossed with distant narrow erect ridges that become sharply angular at the intersection, the entire spaces between them being very closely and regularly ornamented with fine hair-like concentric strise; spire sharp ; aperture narrowly ovate ; outer lip thin at the edge, variced behind, the interior with a tubercle next the posterior sinus, which is broad and shallow. Length 4 lines, breadth 1| line. Hab. Goat Island, Port Jackson ; dredged in 5 fathoms (Brazier). 19. CLATHURELLA SCULPTILIS, n. sp. (Plate I. fig. 19.) Shell fusiformly turreted, moderately solid, pale brown ; whorls 7, rounded, a little excavated next the sutures, longitudinally rather strongly costate, with about nine rounded ribs, between which are numerous fine erect longitudinal striae, which become crescent-shaped on the flattened area below the sutures, and encircled with numerous concentric, somewhat irregular ridges, which are slightly nodulous at the intersections; aperture subpyriform ; outer lip thin, sharp, variced externally, slightly sulcate within ; columella straight; canal slightly produced and everted ; posterior sinus rather deep. Length 4 lines, breadth 1\ line. Hab. Dredged near the " Sow and Pigs," Port Jackson (Brazier). PROC. ZOOL. Soc-1871, No. II. |