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Now, as none of these last, or the unimuscular bivalves, are fresh-water, we may at once presume a deposit containing any of them to be marine. Planorbis euomphalus, Sowerby; fossil. Limnaea longiscala, Brongniart; fossil. Paludina lenta, Brand.; fossil. Succinea amphibia, Drap. Valvata piscinalis, Mull.; fossil. Physa hypnorum, Linne; recent. Auricula; recent. Melania inquinata, Def.
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