7. Ringicula delecta, n. sp. Plate XXI, fig.5.
Shell small, oval-globular, imperforate, with a relatively short conoidal spire, somewhat thin. The sculpture consists of fine slightly variable spirals which somewhat strengthen upon the base, and are a little wider than the grooves; there are eight to ten upon the penultimate whorl, and thirty to forty upon the last, nine to twelve in front of the aperture. These spirals are crossed by close irregular incremental striæ, which in places cut the spirals into minute gemmules, and when prominent produce a lightly costate appearance. Colour white, fresh specimens vitreous. Spire shorter than the aperture, acute, terminating in a sharp apex. Protoconch of about two whorls, the nucleus minute, slightly raised, smooth, the second turn microscopically decussate. Whorls 5, rounded, the last proportionately large, globular, and with convex base. Suture impressed, not channelled. Aperture vertical, semi-lunar, angled above, sinuated and with a very short open canal, notched at the base. Outer lip convex, straightened at the periphery,
regularly arched below, sharp. Inner lip forming a well-defined callus on the body, with one or two low tubercles; columella short, vertical, stoutly callused and with two strong rounded folds, the lower of which is largest, and forms with the end of the columella a prominent rounded point. Altitude, 4·35 mm; diameter, 2·9 mm.
Type in the Colonial Museum, Wellington.
Obs. This pretty little species was represented by a fair number of dead shells amongst our dredgings. It is very distinct and rather more thin than usual in this genus. This is the first species of Ringicula recorded from New Zealand waters.