THE NON-MARINE MOLLUSCS OF ESSEX.
71
B.—River Colne, Halstead ; (Adams) : River Chelmer, Fel-
stead ; (French) : Coggeshall—large striated variation ;
(British Museum) : Coggeshall Abbey ; (Turner) : *Col-
chester ; (Laver) : River Chelmer and Beeleigh Mill :
(E.N., vol. v., p. 253): Broomfield; (E.N., vol. vii.,
p. 76) : Chelmsford ; (C.S.R., Ashford) : Copford ;
(British Museum) ; Clacton (K. and W. after S. P.
Woodward).
C.—Saffron Walden ; (S.W. Museum) : Dovercourt—in a
brackish marsh ; (Adams).
Planorbis spirorbis, Linne.
A.—River Stort ; (Ingold) : Elsenham ; (Hughes) : Wan-
stead; Walthamstow; Barking Side; (Crouch) : *Tilbury
Marsh; (Jenkins Coll.) : Ilford; Canning Town; (K. and
W.) : Walthamstow; (British Museum) : Grays; West
Thurrock : (British Museum).
B.—Coggeshall Abbey ; (Turner) : Little Tey ; (Adams) :
*Colchester; (Laver): South Weald; (C.S.R ,Christy) :
Braintree ; (K. and W.) : *Copford ; Raine ; Witham ;
(British Museum) : Clacton (K. and IF.) : Braintree; (K.
and W.) : Shalford ; (W.M.W.) : Chignal ; (Christy, 3) :
Roxwell ; (R. Christy) : Chelmsford ; (Webb, 5).
C.—Saffron Walden ; (S.W. Museum): Wrabness; (Sheppard
and Collection) : Ramsey ; (Sheppard Collection) : Dover-
court—in a brackish marsh ; (Adams),
Planorbis contortus, Linne.
A.—River Stort ; (Ingold): Hatfield ; (Hughes) : Wanstead ;
Barking Side ; East Ham ; River Roding ; (Crouch) .
-Thurrock Marsh ; Tilbury Marsh ; (Jenkins) : Ilford ;
Canning Town ; (K. and W.) : Walthamstow ; (British
Museum) : Grays ; (Woodward after S. V. Wood).
B.—River Chelmer, Felstead ; (French): Coggeshall; (British
Museum) : *Colchester ; (Laver): Chignal—and albinos ;
(C.S.R., Christy): River Chelmer, Chelmsford; (Christy):
Copford; Raine ; (British Museum) ; Clacton (K. and W.).
C.—Saffron Walden ; (S.W. Museum).
Planorbis fontanus, Lightfoot (=nitidus, Muller in part).
A.—Bishop's Stortford ; (Hughes) : Epping ; (Newstead).
B.—Felstead ; (C.S.R., French—in French's first list Plan-