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Cerithidea sacrata.
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Patella granatina (Linnaeus).
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Radula of Elysia viridis Mont.... Type (a).
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Four examples of Limmnaea peregra Mull., from salt marshes near the Sea of Aral, showing different effects produced by abnormal conditions of life.
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Portion of the radula of Ianthina communis Lam..
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Solarium perspecticum (Linnaeus).
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Reputed Shower of Fish and Nikolaisberg, Transylvania.
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Patella caerulea (Lamarck).
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Cerithium giganteum (Lamarck).
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Scala groenlandica.
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Turritella angulata (Sowerby).
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Limnaea peregra Mull.; e,e, eyes; t,t, tentacles (A). Helix nemoralis Mull.: e,e, eyes; t,t, tentacles; p.o, pulmonary orifice (B)
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Ianthina fragilis Lam. FL, float; O, ova; Pr, proboscis; Br, branchiae; F, foot.
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Solarium perspecticum (Linnaeus).
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Scala argulata.
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Amphibola avellana Chem..
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Aplustrum aplustre L., Mauritius, showing the partly internal shell.
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Turritella replicata (Linnaeus).
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Valvata ouscubakus Nykk,.
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Janthina communis (Lamarck).
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Solarium perspectivum Lam., from the under side.
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Scala lineata.
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Cerithidea scalariformis.
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Turritella terebellata (Lamarck).