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Show 1873.j MR. G. B. SOWERBY ON NEW SHELLS. 719 supra peripheriam lirato-striatis; umbilico valide lirato; apertura oblique circulari, intus atro-fusca, labro reflexo. Hab. Madagascar. A depressedly turbinated shell, widely umbilicated, greyish white, spirally banded with purplish brown, transversely streaked with pale yellow; spire rather acute; whorls rounded, concentrically finely striated, and above the periphery spirally ridged, strongly corded in the umbilicus; aperture rather oblique, interior dark brown; lip reflected. 4. TYPHIS EXPANSUS, sp. nov. (Plate LIX. fig. 4.) T. testa subfusiformi, albida, pallide fusco tincta; spira bre-viuscula, acuminato-turrita; anfractibus transversim obscure liratis, superne angulatis, supra angulum concavis, quadrivari-cosis; varicibus tenuibus, ad angulum falcatis, varice ultimo late expanso reflexo; tubis inter varices brevibus, ultima ; canuli breriusculo; apertura ovali. Hab. ? From the collection of the late Thomas Norris, Esq. A whitish shell, tinged with pale brown ; spire rather short, acu-minately turreted; whorls transversely obscurely ridged, angulated at the upper part, concave above the angle, with four varices hooked at the angle, the last varix being broadly expanded and reflected ; the tubes between the varices are short, with the excention of the last, which is prominent; the canal is rather short. The expansion of the last varix gives this shell its broad appearance. 5. EUTROCHUS ALTERNATUS, sp. nov. (Plate LIX. fig. 5.) E. testa subacute conica, solidiuscula, rosaceo-albida, fusco-et flammulata; anfractibus plano-declivibus, undique dense spiraliter granoso-liratis, liris alternatis, granis parvis; planata, regulariter granoso-lirata, incise umbilicata ; umbilico piano, albo. Hab. Australia? A rather acutely conical shell, pale rose-colour, flamed and spotted with brown; whorls flatly sloping, throughout closely spirally grain-ridged, ridges alternately smaller, grains small; base flat, regularly grain-ridged, with a deeply cut umbilicus, which is smooth and white. Obs. Species of the genus Eutrochus, A. Adams, have been included in the group of Trochidse, distinguished under the title of " Ziziphinus," from which they are separated principally on account of being umbilicated. To this genus or group belong the following species, which have been described under the generic names of Trochus, Ziziphinus, and Eutrochus, viz. :--jujubinus, Gmelin ; pulchellus, Phil.; gemmosus, Reeve; zonamestus, Adams; ticaonicus, Adams ; perspectivus, Adams; scitulus, Adams. All these come from Australia and the Eastern archipelago. Of the new species above described I have only seen one specimen, and have no certain knowledge of its locality ; but it will probably prove an Australian |