70 THE NON-MARINE MOLLUSCS OF ESSEX.
ford; (Christy): Margaretting: (W.M.W.) : Clacton;
(K. and W.) : Shalford; (W.M.W.) : Copford; Braintree;
Raine; (British Museum).
C.—Saffron Walden ; (S.W. Museum) : Wrabness; (Sheppard
and Collection).
Planorbis carinatus, Muller.
A.—River Stort ; (Ingold) : River Lea, Chingford ; (C.S.R.,
Kew) : River Roding, Woodford ; (C.S.R., Oldham) :
Walthamstow; (C.S.R., Kew) : Wanstead Park; (New-
stead) : St. Swithin's Farm ; Whips Cross ; River Lea ;
(Crouch): Lea Valley; Ilford; (K. and W.); Grays
(K. and W. after J. Morris).
B.—River Colne ; (Halstead) : Stebbing Brook, Felstead ;
(French): River Blackwater ; (British Museum): *Col-
chester; *Ardleigh Crown; (Laver): River Chelmer;
Beeleigh Mill ; (E.N., vol. v., p. 253) : Broomfield ;
(E.N., vol. vii., p. 76) ; Clacton (K. and W.).
C.—Saffron Walden ; (S.W. Museum) : Audley End Park ;
(C.S.R., Christy) : Ramsey Stream ; (Sheppard) : Wrab-
ness ; (Sheppard Collection): Dovercourt—in a brackish
marsh ; (Adams).
Planorbis marginatus, Draparnaud.
A.—River Stort ; (Ingold) : Chingford ; (C.S.R., Kew) :
Woodford; (E.N., vol. iii., p. 39): Barking Side;
Whips Cross ; River Lea ; River Roding ; (Crouch) :
Tilbury Marsh ; (Jenkins) : Canning Town ; (K. and W.) :
Ilford; Walthamstow; (British Museum): Docks; (Wood-
ward): Grays; West Thurrock ; (British Museum).
B.—River Chelmer, Felstead; (French): Coggeshall; (Turner):
Colchester; (Laver): Chignal; (C.S.R., Christy) : River
Chelmer ; (E.N., vol. v., p. 253) : Chelmsford; (C.S.R.,
Ashford) : Copford ; Raine; (British Museum) : Clacton
(K. and W. after J. Brown); Chelmsford ; (Webb, 5).
C.—Saffron Walden ; (S.W. Museum): Audley End Park;
(C.S.R., Christy) : Wrabness ; (Sheppard Collection):
Dovercourt—in a brackish marsh ; (Adams).
Planorbis vortex, Linne.
A.—River Stort ; (Ingold) : Epping ; River Roding, Wood-
ford ; (Newstead) : Chingford ; (C.S.R., Scharff) : Wan-
stead ; Walthamstow ; Barking Side ; (Crouch) : *Til-
bury Marsh; (Jenkins): Ilford; (K. and W.): Walthamstow;
(British Museum).