A guide to the fossil invertebrate animals in the Department of geology and palaeontology in the British museum (Natural history) ... / With 7 plates and 96 textfigures.

British Museum (Natural History). Department of Geology

Date:: 1911

Credit: A guide to the fossil invertebrate animals in the Department of geology and palaeontology in the British museum (Natural history) ... / With 7 plates and 96 textfigures. Source: Wellcome Collection.

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$Gallery cihdc (N), Chlamys {Pcctcn] opercularis (8), Cyprina islandim VIII. Macuma \Tdlina\ halthica (N), Mya trvncata (N), Sayhmdaria 2d(ina (8), TridoiUa [Astarte] arctica {^), Vcn- tricola \ Fenuft] casina (8). Central The non-marine series coinprises sliells of laml and CaseAl. fi'esh-water inollusca, found chiefly in river drifts and alluvium. These also are arranged under localities, of which the following are the more important: London and E.ssex (Fulham, Blackfriars, Admiralty Buildings, Lea Valley, Fig. 68.—Shells of Non-marine Mollusca from the Eiver-Drift of the London District. 1, 2, Unto littoralis; 3, 4, Cmhiciila fluminalis; 5,Pi^idiiimastartoides; 6,P.aninicum; 7, J/cZiaj/rMiicMw; S, JV/ZaJes- trina [Hydrobici] marginaUi. (Lent by Mr. B. B. Woodward ; from his paper in Proc. Geol. Assoc., London, XI., p. 335, 1890.) Copford, AValthamstow, Witham, Ilford, and Grays); Kent (Crayford and Crossness); Cambridgeshire (Barnwell and Barrington). Most of the species still live in England, but a few are altogether extinct. Thus of those depicted in Fig. 68 only Fisidium arrmicum remains; other extant species are Helix ncmoralis, Jaminia [/•’ttjoa] m%Lscorum, Foviatias [^Cyclostoma^ elcgans, Bithynia tcntaculata, Ancylus JluviatUis, and Neritina Jluviatilis, among gastropods, with Unio tumidus and Anodonta cyynaea among lamellibranchs.$