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NOTES ON THE MOLLUSCA.
Hygromia rufescens Clausilia rolphii
,, hispida Succinea putris
Helicella caperata ,, elegans
,, itala Carychium minimum
,, carthusiana Limnaea truncatula
Helicigona lapicida Pomatias elegans
,, arbustorum Acicula lineata
Acanthinula aculeata Pisidium fontinale
,, lamellata ,, pusillum.
Since there are no specimens forthcoming, the following
thirteen species must for the present be rejected :—
Vitrea cellaria Pupa muscorum
Hygromia granulata Vertigo pygmaea
Helicella cantiana Clausilia bidentata
Helix aspersa Cochlicopa lubrica
,, hortensis Azeca tridens
,, nemoralis Caecilianella acicula
Balea perversa.
There are only three new records :— Vitrea nitida, Vertigo
pusilla and Vertigo angustior.
The most important species is, of course, Helicella carthusiana.
Its range at the present time in this country is Kent and Sussex,
and in the former county it does not occur north of the river
Stour. That it formerly had a much larger area of distribution
is proved by this occurrence, and by the fact that it has also
been recorded from a Holocene deposit at Butley, near Orford,
Suffolk. In all probability, the deposit [? Felstead, Ed.] is of
of the same age as those at Chignal St. James, Roxwell and
Shalford.
RECENT SPECIES.
The species living in the district at the present time which
have been identified from Mr. French's specimens are sixty in
number :—
Vitrea crystallina Caecilianella acicula
,, alliaria Cochlicopa lubrica
,, glabra Succinea putris
,, nitidula. ,, elegans
,, pura Carychium minimum
,, radiatula Physa hypnorum
,, cellaria Limnaea stagnalis