Some Notes on the Holocene Deposits at North Ferriby. 211 
A.L.S., F.G.S.) — From the small amount of material sub- 
mitted twenty-six species were determined, viz : — 
Carychium minimum (Mull.) Limnaea truncatula (Mull.) 
Limnaea palustris (Miill.) Planorbis leucostoma Mill. 
Aplexa hypnovum (Linn.) 
Lcmria anglica (Fer.) 
Vertigo pusilla (Miill.) 
V . substriata Jeff. 
V . angustior Jeff. 
Columnella edentula (Drap.) 
Acanthinula aculeata (Miill.) 
A. lamellata (Jeff.) 
V allonia costata (Miill.) 
Cochlicopa lubrica (Miill.) 
1933 Sept. 1 
