“NEWNESIA ANTARCTICA.
(Pl. XXV., figs. 1-6.)
Animal testa omnino tectum; caput compressum, antice truncatum, in medio leviter incisum, postice forma tentaculi utrinque productum; oculi inter bases tentaculorum siti; pes mediocriter latus, antice quadratus, postice haud valde acuminatus, in medio glandula minuta instructus; parapodia nulla; pallium margine anteriore incrassato, postice in lobum magnum tenuem testam amplectentem productum; os maxillis corneis baud instructum; lamellae in stomacho nullae; radula 0.1.0. ; dentes centrales 27, conici, triangulares, acuminati, ad apicem prorsum curvati, denticulis quinque parvis utrinque armati, ad basim leviter concavi.
Testa globosa, tenuis, subpellucida, albida, periostraco tenuissimo nitido induta; spira depressa; anfractus tres convexi, sutura profunda sejuncti, ultimus maximus, inerementi lineis tenuibus arcuatis sculptus, undique spiraliter confertim punctato-striatus; apertura late inverse auriformis, maxima, longit. totius 9/10 aequans; labrum tenuissimum, margine columellari leviter reflexo appresso.
Longit.20 mm., diam. 18 mm. Apertura 18 longa, 14 lata.
Habitat.—Cape Adare, 20-24 fathoms.
This very interesting Tectibranch is well distinguished by its very peculiar type of radula. The absence of epipodia and gizard plates also separates it from those genera which it somewhat resembles in shell characters. The general form of the shell is most like that of Hydatina. The globose outline, the visible convolute spire, the form of the aperture and the character of the columella are very similar. I have much pleasure in associating with this interesting new genus the name of the promoter of the expedition, Sir George Newnes, Bart.”
(Smith, 1902: 208-209)
