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Show 1868.] MR. H. ADAMS ON N E W CEYLONESE SHELLS. 293 PLICIFER NEVILLI, II. Ad. (Pl. XXVIII. fig. 16.) P. testa ovato-subulata, tenui, semiopaca, albida; spira elevata, sutura distincta; anfr. 6|, supremis styliformibus, spiraliter liratis, ceteris convexis, flexuose irregulariter striatis, ultimo infiato columella callosa, spiraliter plicata; labro acuto, valde fiexuoso, postice profunde sinuato; apertura subovali, antice ejfusa. Long. 3\, diam. 2 mill. Hab. Ceylon (Mr. Hugh Nevill). CYCLOSTREMA NEVILLI, H. Ad. (Pl. XXVIII. fig. 17.) C. testa anguste umbilicata, alba, subpellucida, nitida, tenui, lirata, et radiatim striata, ad peripheriam Icevi; spira subplana, sutura vix impressa; anfr. 4, sensim accrescentibus, sub-planatis, ultimo angulato, basi subconvexo; apertura ovali; labio calloso, callo circa marginem umbilici continuo; labro simplici. Diam. maj. 4|, min. 3|, alt. 2 mill. Hab. Ceylon (Mr. Hugh Nevill). CYCLOSTREMA (DARONIA) SUBDISJUNCTA, H.Ad. (Pl. XXVIII. fig. 18.) C. testa suborbiculari, nivea, subpellucida, spiraliter costulata, costellis numerosis, cequidistantibus, interstitiis transverse striatis; spira depressa, apice acutiusculo, sutura profunda; anfr. 3^, rapide accrescentibus, rotundatis, primis conti-guis, ultimo antice descendente et longe disjuncto; apertura parum obliqua, subcirculari; perist. continuo, simplici, tenui, acuto. Diam. maj. 10, min. 8, alt. 5 mill.; ap. diam. 4| mill, longa, 4 lata. Hab. Ceylon (Mr. Hugh Nevill). CORBULA (AZARA) ROSTRATA, H.Ad. (Pl. XXVIII. fig. 19.) C. testa ovato-triangulari, tumida, tenui, striis incrementi sculpta, epidermide rufescente induta; umbonibus submedianis, erosis; extremitate antica rotundata, postica truncata; margine dorsali antice arcuato, postice incurvato; margine ventrali concexius-culo ; declivitate umbonali angulata. Long. 9, alt. 6, lat. 4^ mill. Hab. Ceylon (Mr. Hugh Nevill). This species has much the appearance of a Necera, the posterior extremity of the shell being produced into a beak as in that genus. NANINA (MACROCHLAMYS) POWERI, H. Ad. (Pl. XXVIII. fig. 20.) N. testa anguste perforata, depressa, tenui, subpellucida, confertis-sime leviter decussata sub lente, nitidiuscula, virescenti-cornea; spira parum convexa, apice obtuso, sutura marginata; anfr. 4\, vix convexis, ultimo vix descendente, compresso, superne suban-gulato, basi subplanato, in medio impresso; apertura obliqua, lunari; perist. simplici, acuto, recto, margine columellari supra perforationem brevissime reflexo. Diam. maj. 8, min. 7, alt. 3*g mill. |