Proceedings. 9 
corroborate, because last summer near the Butts, on the path at 
the angle, day after day I found fresh H. cantiana shells broken 
in the way that thrushes and blackbirds break them, on a con- 
venient stone. 
Helicigona arbustorum, Linn. Specimens were exhibited 
from several localities : 
(a) From a very abundant deposit at Harlton, Cambridge, of 
Neolithic age according to Rev. Osmond Fisher, F.G.S. 
(6) From Dover, where it is undoubtedly Pleistocene. 
(c) From Redhill osier-bed, near Station, and from Lewes, 
Sussex. 
(d) From Reigate Horseshoe, at depths of 2 ft. 6 in. to 
3 ft. 9 in. 
There are also the yellowish variety from Brigg, and dwarf 
specimens from Shoreham (in Kent), of Mr. Abraham Hale’s 
collection. 
This snail has an extensive range in geological time. It 
has been found abundantly by Mrs. McK. Hughes in the 
Pleistocene gravels of Barnwell and Grantchester, both near 
Cambridge, and is represented in her splendid collection of 
Pleistocene mollusca in the Woodwardian Museum at Cam- 
bridge. From the Barnwell gravels have been identified 
Corbicula (Cyrena) fluminalis—the nearest point of occurrence 
now is Sicily, the rivers of Asia Minor, Syria, and the Nile— 
also Mammoth and Rhinoceros. The occurence of mammoth 
etc. stamps the Barnwell gravels as Pleistocene. The Grant- 
chester gravels are as certainly Pleistocene because of the occur- 
rence of Succinea oblonga, Eulota fruticum, Bos primigenius, 
Elephas primigenius, fossil horse, cave bear, cave hyena, and 
cave lion. These with badger, rhinoceros, hippopotamus, 
reindeer, Irish elk, and Bison priscus occur at Barnwell, which 
is richer in species even than Barrington. 
I have mentioned at length these Pleistocene (Barnwell etc.) 
gravels in connection with H. arbustorum because the deposit at 
Frenches containing mammoth remains is undoubtedly Pleis- 
tocene, and of course is older than the Horseshoe deposit. 
Helwigona arbustorum (with Cl. Rolphii, Buluminus montanus, 
