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Published online by Cambridge University Press: 01 May 2009
Shell oval in shape, very thin, consisting of six whorls, the last one very large and inflated. In some specimens the spire is rather prominent, in others slightly depressed with rather deep sutures. The apex and protoconch when not broken off are pointed and prominent. The aperture is broad in front but narrow behind, and seems to have a faint shallow anterior channel. There is no columellar fold. The outer lip in specimens where it is preserved is sharp and very slightly flattened out and expanded anteriorly. The growth-lines are fairly prominent, and there is a tendency for faint and shallow parallel furrows to develop, especially on the anterior portion. Height about 18 mm.
page 337 note 1 für Min., N. J., Beil. Bd. xviii, pl. xviii, fig. 11, 1904.Google Scholar
page 337 note 2 Tert. u. quart. Versteinerungen Chiles, 1887, pl. xiii, figs. 2a, b, 4.
page 337 note 3 “Die Mollusken der Antarkt. Tertiarformation”: Wissensch. Ergebn. der Schwed. Sudpolar Exped., p. 29, pl. i, figs. 36a–c, 1911.Google Scholar
page 339 note 1 für Min., N.J., Beil. Bd. x, p. 27, 1895.Google Scholar
page 339 note 2 Bericht der Naturgesell. Freiburg, 1907, Bd. xv, p. 63Google Scholar.