350 MR. A. MAYFIELD ON THE MOLLU8CA OF A SUFFOLK PARISH. 
mud brought on their hoofs must often contain the young of 
molluscs. 
In an upland district such as this, one would not expect to meet 
with Unio pictorum, Limncea auricularia, Viviparus viviparus, 
Neritina fluviatilis, and others, that generally frequent rivers and 
bodies of water of large size, but the absence of the following 
species is remarkable : Viviparus contedus, Bijtliinia tentaculata, 
Planorbis carinatus, P. corneus, Valvata piscinalis, and Pisidium 
amnicum. At present I have not yet met with Anodonta cygnaea, 
but I have specimens from a pond in an adjoining parish. 
The following is a list of the fifty-seven species which occur 
within the boundary of Mendlesham. 
Arion ater (L). A few, only the black form occurs. 
A. hortensis, Fer. In gardens and amongst moss. 
A. circumscriptus, Johnst. A few in a garden. 
Amalia sowerbyi (Fer.). One specimen. 
Limax maximus, L. In crevices of old stone walls. 
L. flavus, L. In cellars and outhouses. 
Agriolimax agrestis, L. Gardens and fields. 
A. laevis, Miill. Sparingly near ponds. 
Vitrina pellucida (Miill.). Rather common among wet decaying 
leaves. 
Hyalin ia cellaria (Miill.). In gardens, under decayed rubbish. 
H. glabra (Studer). Rather plentiful among dead leaves in 
hedgerows, and under the bark of old trees. 
H. nitidula (Drap.). Very common in similar situations to the 
preceding. 
H. pura (Alder). A few in moss. 
Ii. radiatula (Alder). Very sparingly. 
Id. c rystalli N a (Miill.). Very common in all damp places. 
Id. fulva (Miill.). Rare ; five specimens on a ditch bank, 
Helix rotundata, Miill. Common ; very abundant in the 
churchyard. I counted over a hundred specimens 
under the ivy on one tombstone. 
H. pygmaea, Drap. Common among dead leaves under hedges. 
H. aculeata, Miill. Not common; a few^taken with the pre- 
ceding species. 
Id. pulchella, Miill. Sparingly, in the moss on ditch-banks. 
H. lapicida, L. Rare ; a few specimens in one spot. 
