3762 Mollusks. 



Bithinia ventricosa. In a ditch at the foot of Bullingdon Com- 

 mon, rare. 



Valvata piscinalis. By no means common ; West Hinksey, Port 

 Meadow. 



Arion ater. Common in the wet meadows, but I have only met 

 with the black variety. 



Limax flavus. One specimen. 



„ agrestis. Abundant everywhere. 

 Helix aspersa. Very abundant. 

 „ hortensis. Common. 



„ nemoralis. Very abundant and exceedingly varied. 

 „ pomatia. Stonesfield. 



arbustorum. In many of the hedges, particularly at Somers- 



3J 



town. 



Hills. 



pulchella. Banks of the river Isis. 



Cantiana. Abundant, but local ; Heddington and Shotover 



„ granulata. Marshy ground at the foot of Bullingdon. 

 „ hispida. Common. 



„ coneinna. Not common ; Magdalen walks. 

 „ rufescens. Very common in hedges. 



„ virgata. On the dry hills around Bullingdon, Heddington, 

 Shotover and Bagley. 



„ caperata. Not so common as the last; Bullingdon and 

 Heddington. 



„ ericetorum. Not common ; Heddington and Bullingdon. 

 Zonites radiatulus. I have a shell which I found in Magdalen 

 walks, and which I cannot name, unless as a variety of this species. 

 It differs from the usual type in being altogether larger, the whorls 

 more rounded, and of slower increase, the colour deeper, and the shell 

 opaque ; the striae, umbilicus, &c, are the same as usual. 

 Zonites lucidus. Banks of the river Isis. 

 Succinea putris. Common ; Isis and Cherwell. 



„ Pfeifferi. Rare ; in a ditch running along the side of 

 Cowley Marsh. I cannot help regarding this as merely a variety of 

 the last. 



Zua lubrica. Common ; Magdalen walks, &c. 

 Pupa marginata. Rare ; Heddington. 

 Clausilia nigricans. Bagley and Shotover. 



Limnaeus auricularis. Found in many of the ditches round Oxford, 

 very common in the Cherwell. 



