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Show 1870.] MR. G. B. SOWERBY ON N E W SHELLS. 251 AMATHINA TRIGONA. A. testa parva, solida, superne complanato, medio carinis duabus distantibus divergentibus, et infra medium costellis tribus spiraliter radiata, infra costas planata ; apice parvo, acuminato ; apertura magna, trigona; margine basali declivi, oblique producto. Hab. Tongataboo, Friendly Islands (Mr. Brazier). This new Amathina has two widely diverging principal keels or ribs, above which is a broadly flattened, depressed area, and below which are several small ribs and a plain space. ELENCHUS DILATATUS. E. testa brevi, subcinerea, spiraliter subdistanter lirata; spira brevi ; anfractibus quatuor, ultimo lato ; apertura dilatata, viridi-ceeruleo iridescente. Hab. New Zealand (Mr. Brazier). Remarkable for the expansion of the last whorl. SOLARIELLA UNDATA. S. testa subdepressa, umbilico rotundo usque ad apicem perforata, margaritacea, pallide rubescente, spiraliter tenuiter lirata, supra prope suturam angulata; medio anfractuum carina rotundato-angu-lata, angulis distanter rubro maculatis; interstitiis rubro undato-lineatis. Hab. Agulhas Bank, S. Africa. Mus. Taylor. CYLLENE RUBRO-LINEATA. C. testa ovato-acuminata, albido-fulvescente, ad dorsum pallide purpurea; spira breviuscula, acuminata; anfractibus numerosis, longitudinaliter oblique liratis ; apertura longitudine spiram superante, intus castanea, labio columellari late reflexo linea rubra circumscripta ; labio externo intus striato, extus post marginem incrassato ; sinu antico parvo. Hab. 1 Mus. Taylor. TYPHIS DUPLICATUS. (Plate XXI. fig. 1.) T. testa ovato-acuminata, inter varices castanea, varicibus arcuatim recurvis cum tubis interstitialibus junctis, tubas latas complanatas duplicatas efformantibus; spira acuminata; apertura subrotunda; canali elongato, clause Hab. China Seas. A second example of the peculiar form first presented by T. arcuatus Hind., in which the varix is bent back towards the interstitial tube so as to form a double varix with a single opening. In the present case the union is less complete, and the opening part of the tube is broad, flattened, and contracted in the middle, so as to appear duplicate. |