Comprehensive Description

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Description

N. grayi, D’Orbigny, f. 126. – T. ovalis, longitudine latitudinem multo superante, subventricosa, lævis, cute nitidissimâ olivaceo-virente (rarius olivaceo-fuscescente) induta, anticè subattenuatè, posticè subangulatim, rotundata. Latus posticum haud perbreve. Margo dorsalis anticè convexus, prope nates haud eminentes vix declivis; posticè rectiusculus, satis modicè declivis; ventralis integer, arcuatus, utrinque valde acclivis. Areæ dorsales haud definitæ: postica subplanulata. – Oval, thin, much longer than broad, only subventricose, with a polished greenish-olive (or more rarely brownish-olive) epidermis, smooth, with at most obsolete wrinkles of increase, which are more manifest on the lunular region, rounded at both ends, somewhat taperingly so in front, subangulately so behind. Hinder side rather elongated for the genus. Front dorsal edge convex, at first scarcely sloping; hinder one only moderate, straightish. Ventral margin entire, arcuated, much curving up at both ends. Dorsal areas undefined, the hinder one somewhat flattened. Beaks not prominent.”

 

 

(Hanley, 1860)

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© National Museum of Natural History, Smithsonian Institution

Source: Antarctic Invertebrates Website (NMNH)

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