76 THE NON-MARINE MOLLUSCS OF ESSEX.
Family—Cyclostomatilae.
Genus—POMATIAS, Studer, 1789 (=Cyclostoma,
Draparnaud),
Pomatias elegans, Muller.
B.—Felstead, 1890, in an area less than 100 yards wide at its
greatest diameter ; (French, E.N., vol. iv., pp. 92-94) :
Coggeshall ; ( ? ) : *Felstead ; (French) : Witham ;
(British Museum): Shalford; (W.M.W.): '''Chignal;
(Christy, 3): Roxwell; (R. Christy).
C.—Saffron Walden—dead shells ; (Christy) : Wicken Bon-
hunt ; (S.W. Museum) : Belchamp ; (King) : [Mount
Bures ; (C.S.R., Crowther).]
Family—Aciculidae.
Genus—ACICULA, Hartmann, 1821.
[Acicula lineata, Draparnaud.]
B.—[Felstead; (French)]: *Copford; (British Museum) : Shal-
ford; (W.M.W.): Chignal; Christy, 3); Roxwell; (R.
Christy).
Sub-order—DIOTOCARDIA.
(a) AZYGOBRANCHIA.
Family—Neritidae.
Genus—NERITINA, Lamark, 1809.
Neritina fluviatilis, Linne,
A.—River Lea, Chingford; (C.S.R., Scharff): *Old River
Lea ; (Cole) : River Roding ; Crooked Meadow ;
St. Swithin's Farm ; Wanstead Park ; River Lea ;
(Crouch) : Canning Town ; (K. and W.) : Walthamstow ;
(British Museum) : Docks; British Museum).
B.—Coggeshall ; (British Museum) ; Colchester ; (Laver) :
River Chelmer ; (E.N., vol. v., p. 253) : Broomfield ;
(E.N., vol. vii., p. 76) : [Felstead—in alluvium ; (French)],
C.—*River Stour ; (King).