Page:VCH Buckinghamshire 1.djvu/114

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A HISTORY OF BUCKINGHAMSHIRE

Hygromia rufescens (Penn.)
Acanthinula aculeata (Müll.)
—— lamellata (Jeff.) Ashton Clinton
Vallonia pulchella (Mull.)
Helicigona lapicida (Linn.)
—— arbustorum (Linn.)
Helix aspersa, Müll.
—— pomatia, Linn. Great Marlow ; Hambledon
—— nemoralis, Linn.
—— hortensis, Müll.*
—— Buliminus obscurus (Müll.)
Cochicopa lubrica (Müll.)
Azeca tridens (Pult.) Amersham ; Fawley Woods
Cæcilianella acicula (Müll.)*
Pupa secale, Drap.
—— cylindracea (Da C.)*
—— muscorum (Linn.)
Sphyradium edentulum (Drap.)*
Vertigo pygnuea (Drap.)
Balea perversa (Linn.)*
Clausilia laminata (Mont.)*
—— bidentata (Ström.)
Succinea putris (Linn.)
—— elegans, Risso.*

b. Basommatophora


Carycbium minimum. Müll.
Ancylus fluviatilis, Müll.
Velletia lacustris (Linn.)*
Limncea auricularia (Linn.)
—— pereger (Müll.)
—— palustris (Müll.)*
—— truncatula (Müll.)
—— stagnalis (Linn.)
Amphipeplea glutinosa (Müll.) Buckingham Taplow
Planorbis corneus (Linn.)
—— albus, Müll.
—— nautileus (Linn.)
—— carinatus, Müll.
—— marginatus, Drap.
—— vortex (Linn.)
—— spirorbis, Müll.*
—— contortus (Linn.)
—— fontanus (Lightf.)
—— lineatus (Walker)
Physa fontinalis (Linn.)
—— hypnorum (Linn.)*

II. PROSOBRANCHIATA



Bitbynia tentaculata (Linn.)
—— leachii (Shepp.)*
Vivipara contecta (Millett)
Valvata piscinalis (Müll.)
—— cristata, Müll.
Pematias elegans (Müll.) Halton
Aclcula lineata (Drap.) Fawley Woods
Neritina fluviatilis (Linn.)

B. PELECYPODA


Dreissensia polymorpha (Pall.)*
Unio pictorum (Linn.)
—— tumidus, Retz.
Anodonta cygnæa (Linn.)
Sphærium rivicola (Leach)
—— corneum (Linn.)
Sphærium lacustre (Müll.)
Pisidium amnicum (Müull.)
——pusillum (Gmel.)
——nitidum, Jenyns *
—— fontinale (Drap.) The variety P. henslowianum occurs in the Thames