74 THE NON-MARINE MOLLUSCS OF ESSEX.
Docks; Grays ; West Thurrock ; (British Museum).
B.—Finchingfield ; (Bailey) ; River Colne. Halstead ;
(Adams) : River Chelmer, Felstead ; (French) : Cogges-
hall; (British Museum): *Colchester; (Laver): Witham;
(Turner) : River Chelmer and Beeleigh Mill ; (E.N.,
vol. v., p. 253) : Chelmsford ; (Christy) : River Cann ;
(W.M.W.) : Ponds, Broomfield ; (E.N., vol. vii., p. 76) ;
Raine; Braintree; Copford; * Clacton; (British Museum):
Chignal; (Christy, 3).
C.—Saffron Walden ; (S.W. Museum) : Harwich—opercula
only; (British Museum).
Bythinia leachii, Sheppard. The type is in the Sheppard
Collection.
A.—River Stort; (Ingold): Fern Hall; St. Swithin's; (Crouch):
Coldharbour Marsh ; (Jenkins) : Tilbury Marsh ; (Jen-
kins Coll.) : Ilford; (Woodward): Walthamstow; (British
Museum) : Grays (K. and W.).
B.—River Colne, Halstead , (Adams) : River Chelmer, Fel-
stead ; (French) : Coggeshall; (British Museum) : *Col-
chester; (Laver): River Chelmer, Broomfield ; (Christy):
Chelmsford; (W.M.W.).
C.—Saffron Walden ; (S.W. Museum) ; Harwich (K. and W.
after S. P. Woodward).
Family—Viviparidae.
Genus—VIVIPARA, Montfort, 1810 (=Paludiua, Lamark).
Vivipara contecta, Millet.
A.—[‡Recorded in error, Ingold, for Bishop's Stortford
District.] Old River Lea ; (Laver Collection) : Lea
Valley ; (K. and W.).
B.—*Colchester ; (Laver Collection).
C.—River Stour ; (Laver).
Vivipara vivipara, Linne.
A.—River Stort; (Ingold) : Roydon ; (Laver Coll.) : River
Lea, Chingford ; (C.S.R., Scharff) : River Roding,
Woodford Bridge to Red Bridge, Wanstead , (Crouch) :
Canning Town ; Lea Valley; (K. and W.).
C.—Saffron Walden ; (S.W. Museum): River Stour; (King).