RICHARDSON : MOLLUSCA OF CLAPHAM. 6 1 



Helix rufescens Penn. Extremely common, as also white 



variety. 

 Helix hispida L. Common. 

 Helix rotundata Miill Not very common. 

 Helix rupestris Drap. All old walls and limestone scars. 

 Bulimus obscurus (Miill). Kingsdale, Clapham Woods, 



not uncommon in moss. 

 Pupa secale Drap. Kingsdale, slopes of Ingleborough, 



common. 

 Pupa umbilicata Drap. Very common. 

 P. umbilicata var. albina Moq. Kingsdale, one specimen. 

 Pupa mu SCO rum. Farrar's Grounds, Clapham. 

 Vertigo edentula (Drap.). Kingsdale. 

 Balea perversa (L.). Wall on road to station, a few hundred 



yards from Clapham, apparently feeding on Physcia parie- 



taria. 

 Clausilia rugosa Drap. Generally distributed. 

 C. rugosa var. dubia Drap. Woods near Clapham ; usually 



at higher altitudes than type. 

 C. rugosa var. tumidula Jeff. Clapham Woods; rare. 

 Clausilia laminata (Mont.). Kingsdale, Clapham, on the 



limestone. 

 Cochiicopa tridens (Pult.). Clapham Woods, and in Kings- 

 dale. 

 Cochlicopa lubrica (Miill). Ubiquitous. 

 Carychium minimum Miill. Kingsdale; Clapham Woods. 

 Sph^rium corneum (L.) Lake marl, Crummockdale, H.R. 



Pisidium Lake marl, Crummockdale, H.R. 



Valvata piscinalis (Miill.) Lake marl, Crummockdale, H.R. 

 Valvata cristata Miill. Lake marl, Crummockdale, H.R. 

 Planorbis nitidus (Miill). Lake marl, Crummockdale, one 



specimen, J.R.B.T. 

 Limnaea peregra (Miill). Lake mar], Crummockdale, H.R. 

 Limneea palustris (Miill). Lake marl, Crummockdale, 



H.R. 



