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Show 442 MR. E. A. SMITH ON NEW SHELLS FROM [June 16, carinam cequaliter convexa ; anfractus normales 3, ad suturam carina marginati, radiatim tenuiter plicati (plicis supra anfr. ultimum fere obsoletis), liris duabus (altera supra, altera suturam infra) plus minus indistinctis supra plicas leviter nodulosis cincti; anfr. ultimus prope umbilicum radiatim plicatus, peri-pheriam versus concentrice subliratus ; umbilicus carina intrante crenulata marginatus ; apertura rotunde subtriangularis. Diam. maj. 7\ millim., min. 6| ; alt. 4; umbilicus 2 latus. This species somewhat resembles S. discus of Philippi as regards general form, but it appears to be more acutely carinate, and there are differences in the aperture. The apex consists of about one and a half smooth convex whorls which are incoiled and thus conceal the nucleus. 20. BULLA INCOMMODA. (Plate XXXV. fig. 20.) Testa parva, anguste umbilicata, ovata, alba, nitida, superne et inferne striis transversis paucis sculpta, incrementi lineis striata apex angustissime perforatus; apertura angusta, infra paulo dilatata, superne supra apicem producta ; columella leviter torta, inferne arcuata, repZexa, expansa. Longit. 5-| millim., diam.. maj. 3|, min. 3. The few spiral stria? at each end are rather far apart, with the exception of those immediately around the umbilicus, which are more approximated. 21. CYLICHNA ORDINARIA. (Plate XXXV. fig. 21.) Testa cylindracea, alba, nitida, imperforata, ad apicem haudpro-funde excavata, impressione carina circumdata ; apertura angus-tissima, antice dilatata, subtruncata ; columella subtorta, excavata, carina circumcincta. Longit. 7 millim., diam. 3. The distinguishing feature of this species is the excavation of the lower part of the columella, which is circumscribed by a keel, a continuation of the thin outer lip. 22. TELLIMYA SUBACUMINATA. (Plate XXXV. fig. 22.) Testa M . acuminata? similis, sed postice minus rostrata, margine inferiore latins curvato, postico dorsali declivi, fere rectilineari. Longit. 5 millim., alt. 4, diam. 24-. This species closely resembles Montacuta acuminata, Smith, from North Australia, but differs in form somewhat. It is longer in proportion to the height, has the ventral outline more gently curved, the posterior end is not so beaked, and the dorsal slopes, especially the posterior one, are more rectilinear. The sculpture and dentition are similar. 23. NUCULA DILECTA. (Plate XXXV. fig. 23.) Testa parva, incequilateralis, ovata, utrinque subcequalis, nitida, incrementi lineis tenuibus striata, dilute virenti-lutea, umbones versus pallidior, induta ; apices opaci, albi, antemediani, ad 3 |