APPENDIX TO THE ARTICLE ON 

 THE MOLLUSCA. 



Since going to press the writer is indebted to Mrs Hughes 

 for the following additional localities and notes on living forms 

 from her own observations. 



Neritina fluviatilis ; Hauxton Mill, Ditton. 



Vivipara vivipara; the record on p. 123 is based on a 

 single specimen in Wisbech Museum, which is possibly a young 

 V. contecta. 



Limnaea truncatula ; "Wisbech Canal (brackish water), 

 River Nene, Roslyn Pit at Ely. 



Planorbis crista; White House Drove near Littleport, 

 March. 



Vitrea rogersi; fairly common, Cambridge, Harston, 

 Hauxton. 



V. radiatula; Hauxton Mill. 



Zonitoides excavatus; Madingley, March. 



Euconulus fulmis ; Grantchester, Madingley, etc. 



Sphyradium edentulum; Roman Road on the Gogmagog. 



Hygromia granulata ; Hauxton, Whittlesford, Waterbeach. 



Acanthinula aculeata; found again recently in Madingley 

 Wood by Mrs Hughes and Mr Laidlaw (see p. 121). 



Vallonia pulchella; Thorney, Cherryhinton, but less com- 

 mon than V. costata, which is found all over the county (see 

 p. 122). _ 



Helicigona lapicida; alive at Fen Ditton (see p. 130); 

 seems dying out. 



M. & s. 17 



