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Show 1880.] LAND-SHELLS O F M E N T O N . 121 new species, immediately above the spot I call deposit B; but in no case could I find a specimen undoubtedly associated with the species of this deposit; it may be that they are of the same age, only that they were not living immediately mixed up with these other mollusks. After a long and tedious investigation I have come (though somewhat doubtfully) to the opposite opinion ; I believe they are of a more recent age, and have been buried through some altogether different cause. I purpose giving a full description and figure at some future time, as I wish to compare the species of this group with m y Spanish, Algerian, and Corsican specimens, which are not at the moment available. Alt. 10, diam. 18| millim. Type, Indian Museum, Calcutta. HELIX (XEROPHILA) TERVERI (?), Michaud. I think there is little doubt this is the species living specimens of which, from Toulon, were described aud figured under the above name by M . Rambur (Journ. Conchyl. 1869). It does not exist now at Menton, where varieties of H. cespitum have taken its place; I found it, however, subfossil and by no means uncommon near Roquebrune station, near deposits B and D, and in the lower stratum at Cape Mortela, immediately associated with //. paretiana. Alt. Ilf, diam. 19 millim. Var. SUBARENARUM, UOV. A larger and more globose form, very likely specifically distinct, of which I found a few specimens only, subfossil. Alt. 14, diam. 21^ millim. Both the preceding forms, Indian Museum, Calcutta. HELIX (XEROPHILA) SCLERA, n. sp. T.adH. cespitum et H. Terveri affinis: conico-elevata, per anguste profundeque umbilicata, solida ; alba (aut cretacea), zonulis variis circumscripta, apice corneo ac notabiliter acuto; anfract. 7, convexiusculi, sutura perimpressa separati, ultimo majore, rotundato, basi convexo^ prope aperturam celeriter descendente ac vix dilatato ; apertura haud producta, fere rotundata, margine externo convexo; superne regulariter confertim striata, striis obliquis, subfiexuosis et planiusculis. Alt. 13|, diam. 19 millim. Another very distinct species of the same group; the least openly umbilicate, with the most subconvexly raised spire and the most prominently acute apex of any I know ; the rapidly descending, scarcely dilated and rounded last whorl, as also the more distinct, subflexiious sculpture are also apparently constant characters; it only occurred, subfossil, imbedded in hard and solid rock, in the upper surface of deposit E, evidently associated with Stenogyra decollata. Type, Indian Museum, Calcutta. |