Mrs. McKenny Hughes—Pleistocene Mollusca. 205 
There are also in the gravels described some six or eight shells 
which we do not now find in the neighbourhood of Cambridge, 
but which occur elsewhere in the British Isles. 
Succinea oblonga, Drap., is mentioned by Gwyn-Jeffreys! as rare 
in Wales, Scotland and Ireland and in England is recorded from 
Braunton Burrows in Devonshire only. Its habitat is “‘ dry ditches 
near the sea-coast.” 
Helix (Anchistoma) obvoluta, Mull. This shell, says Jeffreys, 
lives on stumps and at the roots of trees in woods in Hampshire. Da 
Costa and Taylor give it a somewhat wider range in the south of 
England, mentioning also Surrey and West Sussex. 
Jeffreys observes that it occurs in France, Germany, Switzerland, 
and Lombardy, but that it does not seem to inhabit the extreme 
north and south of Europe.’ 
Clessin says that it is less common in the north than in the south 
of Germany, and he records it also from Bohemia.’ This occurrence 
of H. obvoluta in the gravels shows that it is not a form now 
advancing from the south, but is, on the contrary, a species which is 
dying out in England, but still survives in the south. 
Helix (Acanthinula) lamellata, Jeff., is now found only in the 
north of England, Anglesey, north and west of Scotland, Ireland, 
Sweden. Clessin‘* records it from North Germany. In this shell 
we have, in contrast to the last-mentioned species, an example of 
a form which has become extinct in the south of England, but is 
still fairly plentiful in the north. 
Vertigo angustior, Jeff. The habitat of this rare shell is “in the 
roots of grass in marshy ground.” Jeffreys found it near Swansea 
and in the rejectamenta of the river Avon at Bristol. He records it 
from Tenby, Battersea Fields, and Ireland, the north-east and south 
of France, Germany, Switzerland, and ov Lugano in Italy.° 
Mr. Charles Ashford, who kindly examined a specimen which 
I had discovered at Barnwell, found on comparing it with recent 
Vertigo pusilla in his collection from Yorkshire, that amongst them 
was one undoubted Vertigo angustior which he had hitherto over- 
looked. I have found it in Westmoreland also. Miss Esmark 
records it from South Norway and Sweden.® 
Possibly the following species did not appear in England till after 
the deposition of these gravels. 
Helix (Fruticicola) cantiana, Mont., does not seem to occur in the 
gravels. It is very common round Cambridge at the present time, 
and is found in the north and south of England, but not in Scotland 
or Ireland. It lives in France, Belgium, parts of Germany, Italy, 
Illyria, and Sicily. 
It is doubtful whether Helix (Fruticicola) rufescens, Pennant, is 
found in the gravels. It is now widely distributed over England, 
and occurs in Ireland, but not in Scotland. 
Helix aspersa, Miill., is not recorded from any of the localities 
1 Brit. Conch. vol. i. p. 154. 2 Op. cit. p. 230. 
3 Deutsch. Exe. Moll.-Fauna, p. 134. £ Op: cit. p. 129. 
° Brit. Conch. vol. i. p. 266. 6 Journ. Conch. vol. v. p. 127. 
