96 THE ZOOLOGIST. 
Cray ; Croydon Club district (M‘Kean) ; (Sussex, Lewes (J. H. A. 
Jenner) ; Herts, Ware (Dr. Jeffreys).] 
Var. pulchella.—Croydon Club district (M‘Kean). 
Var. cinerea.—Croydon Club district (M‘Kean); Middlesex, 
Northend, near Hampstead (T. C.). 
P. pusillum.—West Kent, Bickley and Sidcup; Surrey, Kew, 
in rejectamenta of Thames (T. C.), Wray Common (E. Saunders) ; 
Middlesex, Bedford Park (T.C.), Brentford (Mrs. Skilton) ; 
(Sussex, Lewes (Jenner); Hants, Preston Candover (Fitzgerald) ; 
Herts, Ware (J. Gwyn Jeffreys).] 
Var. obtusalis.—Chislehurst Common (T. C.); Surrey, Wray 
Park (E. Saunders). 
P. nitidum.—West Kent, Chislehurst Common (T.C.); [Sussex, 
Lewes (Jenner); Hants, Preston Candover (Fitzgerald); Herts, 
Ware (J. Gwyn Jeffreys).] 
P. roseum.— Croydon Club district (M‘Kean); [Ware (J. G. 
Jeffreys).] 
Unio tumidus.— Middlesex, River Brent (T.C.); Enfield 
(S. C. C.); Surrey, Basingstoke Canal (M‘Kean). 
Var. ovalis and var. richii.—Middlesex. 
U. pictorum.—Middlesex, River Brent; Surrey, River Wey, 
near Guildford (M‘Kean). 
Var. radiata.—Middlesex and Surrey. 
[Var. compressa.— Ware (Jeffreys) ; type, Herts and Sussex.] 
(U. margaritifer.—Specimens liberated in River Wandle, 1875, 
but probably all died out. Kent, M‘Kean). 
(U. littoralis.—Fossil in Essex, recent in North France. 
U. batavus, North France.] 
U. edwardsi and U. deshayesti.—-Fossil in Woolwich beds. 
Anadonta cygnea.—West Kent, Beckenham ; Surrey, Fetcham 
Common (M‘Kean) ; Middlesex, Regent’s Park (S.C. C.); [Sussex, 
Lewes (Jenner) ; Bucks (Roebuck) ; Herts (Jeffreys).] 
Var. incrassata.—West Kent, Beckenham (S. C. C.). 
A. anatina.—East Kent, Minster and Ebbsfleet ; West Kent, 
between Lamberhurst and Paddock Wood; Surrey, stream west 
of Nutfield Marsh (M‘Kean) ; Middlesex, Regent’s Park (T.C.). 
Var. ventricosa.—River Brent (Mrs. Skilton). 
Var. radiata.— Croydon Club distr. (M‘Kean). [Type, Sussex.] 
Dreissena polymorpha.—Middlesex, dead shells in River Brent ; 
Surrey, River Wey (M‘Kean). 
