BULLEN : ON POST-TERTIARY NON-MARINE MOLLUSCA. 319 
Helix aspersa also occurred, but since it was not among the ejecta 
of the mole-heaps it is not included in the above list, “although it 
resembles the other shells in condition. 
IV. Tue Down azpovE Dorpte Barn Door AND BEHIND SWYRE 
Heap, Dorset. 
T examined the cliff-section where accessible for a deposit resembling 
the late Pleistocene deposit at Portland Bill, but was unsuccessful. 
I then turned my attention to the ejecta of the mole-hills and rabbit- 
watrrens. The list of finds was as under :— 
Vitrea nitidula (Drap.). 
Arion ater (Linn.). 
Pyramidula rotundata (Mill.). 
Helicella itala (Linn.). 
Helicella virgata (Da C.). 
Hygromia hispida (Linn.). 
Vallonia pulchella (Miill.). 
Feliz aspersa, Mill. 
Feliz nemoralis, Linn. 
Ena obscura (Miill.). 
Pupa secale, Drap. 
Pupa muscorum (Linn.). 
Vertigo pygmea (Drap.). 
Pomatias elegans (Miill.). 
V. FoLkeEstone. 
The following species were procured from a section exposed by the 
cutting of a wide driving-road under the South Downs at the back 
of the town, about a mile from the sea. Unfortunately, my time 
was rather short, or no doubt the list of species would be longer. 
The general nature of the section examined is similar to the 
Neolithic and Roman layers exposed at Buckland, near Dover, in 1878, 
and described by me in these ‘* Proceedings,”’ vol. 111, p. 162. 
Helix aspersa is especially in evidence. The section exposed varies 
in depth from about 4 to 6 feet and over. The list of shells is as 
follows :— 
Hygromia hispida (Linn.). 
Vallonia pulchella (Miill.). 
Helix aspersa, Mill. 
Helix nemoralis, Linn. 
Arion ater (Linn ). 
Helicella itala (Linn. ). 
Helicella cantiana (Montagu). 
Felicella cartusiana (Miill.). 
Hygromia rufescens (Penn.). 
In conclusion, I have to thank my old friend the Rey. Osmond 
Fisher for invaluable information about the Harlton deposit and 
guidance to the undisturbed part of the field, and Mr. B. B. Woodward 
for identifying the specimens of Vertigo from Harlton, and the muti- 
lated shells of P. secale and EZ. obscura from above Durdle Barn Door ; 
the latter is more strongly striated than usual, and P. secale has lost 
its peristome and part of the body-whorl. Mr. Woodward also agrees 
with my identification of I. gagates. 
