234 



ME. A. S. KEXXAEB & ME. B. B. WOOBWAEB OX [vol. lxXY, 



Pit, Cambridge,' a 

 The species are : — 



section which we have been unable to locate. 



Hygromia hispida (Linne). 

 H. liberta (Westerlund). 

 Arianta arbustorum (Linne). 

 Cochlicopa lubrica (Miiller). 

 Ancylvs fluviatiUs (Miiller). 



This series clearly indicates a zone identical in asre with that at 



Bithynia tentaculata (Linne). 

 Valvata piscinalis (Miiller). 

 Corbicida fluminalis (Miiller). 

 Pisidium amnicum (Miiller). 



Barnwell Abbey 



Grantch ester. 



The Pleistocene deposits at Grantchester were described in 1888 

 by Mrs. Hughes, and the contained niollusca enumerated. 1 She says, 



; All the shells in the Woodwardian Museum were obtained from one rich 

 deposit of small extent close to the farm-track, just beyond the S.W. corner 

 of the camp, at a depth.of about 5 to 8 feet from the surface. This pit is now 

 filled up, and although there are here and there openings from which sand 

 and gravel are being dug no shells have been found in them.' 



The species obtained at Grantehester are sixty-two in number, 

 namely :— 



Vitrea crystallina (Miiller). 

 Polita cellaria (Miiller). 

 P. nitidula (Draparnaud). 

 P. radiatula (Alder). 

 Zonitoides nitidus (Miiller). 

 Eucoiadus fulvus (Miiller). 

 Punctum pygmseum (Draparnaud). 

 Pyramidida rotundata (Miiller). 

 Eulota fruticum (Miiller). 

 Helicella itala (Linne). 

 ? H. striata (Miiller). 

 H. crayfordensis Kennard & B. B. 



Woodward. 

 Hygromia hispida (Linne). 

 H. liberta (Westerlund). 

 Acanthi mda aculeata (Miiller). 

 Vallonia pulchella (Miiller). 

 1". excentrica Sterki. 

 V. costata (Miiller). 

 Helicodonta obvohita (Miiller). 

 Helicigona lapicida (Miiller). 

 Arianta arbustorum (Linne). 

 Helix nemoralis Linne. 

 Ena montana (Draparnaud). 

 E. obseura (Miiller). 

 Cochlicopa lubrica (Miiller). 

 Azeca goodcdli (Ferussac). 

 Csecilioides acicula (Miiller). 

 Papilla muscorwm (Linne). 

 Vertigo antivertigo (Draparnaud). 

 r. pygmsea (Draparnaud). 

 V. motrtinsiana (Dupm r ). 



Vertigo angustior Jeffreys. 



Clavsilia mgosa Draparnaud. 



C. pum ila, C. Pfeiffer (Ziegler MS.). 



Succinea putris (Linne'). 



S. elegans Bis so. 



8. oblonga Draparnaud. 



Carycliium minimum Miiller. 



Ancylus fluviatiUs (Miiller). 



Acroloxus lacnstris (Miiller). 



Limnsea auriadaria (Linne). 



L. pereger (Miiller). 



L. palustris (Miiller). 



L. truncatula (Miiller). 



L. stagnalis (Linne). 



Planorbis Isevis Alder. 



P. crista (Linne). 



P. carinatus (Miiller). 



P. umbilicatxis (Miiller). 



P. vortex (Linne). 



P. leucostoma (Miller). 



P. contortus Linne. 



Phi/sa fontinalis (Linne). 



Aplexa hypnoriim (Linne). 



Bithynia tentaadata (Linne). 



Valvata piscinalis (Miiller). 



V. cristata Miiller. 



TJnio pictorum (Linne). 



U. littoralis Lamarck. 



Corbieida fluminalis (Miiller). 



S pi i cerium corneum (Linne). 



Pisidium amnicum (Miiller). 



Geol, Mag. dec. 3. vol. v. p. 197. 



