By E. W. Sioanton. 59 



In the Museum of the Wilts Archaeological and Natural History 

 Society at Devizes is deposited a collection of land and freshwater 

 shells, made by Miss Anne Cunnington. They were, for the most 

 part, collected in the neighbourhood of Devizes, between 1843 and 

 1850,and comprise sixty-six species. Localities are given in a manu- 

 script book ; these are incorporated in my list, with some necessary 

 alterations in nomenclature, and with notification of varieties. 



In addition to the three collections above alluded to, I have also 

 examined one formed by Mr. C. D. Heginbothom, who has been 

 an assiduous collector for many years in the neighbourhood of 

 Devizes. I am specially indebted to him for much kind help in 

 the preparation of these notes ; also to my friend, Mr. Thomas 

 Baker, of Salisbury, the well-known Wiltshire antiquary. 



Sources from which information has been obtained, additional 

 to those already indicated, are given in the Bibliography at the 

 end of this paper. 



The greatest length and breadth of Wiltshire are respectively 

 54 and 37 miles. Its area is 1,354 square miles, or 866,677 acres. 

 The population, as might be expected in a county containing so 

 much open pasture land, is remarkably small, being (in 1901) only 

 273,845. The soil is chiefly Chalk. A Greensand valley divides 

 the Marlborough Downs from the great Salisbury Plain, and both 

 are bounded by Greensand on the west. Boughly speaking, a belt 

 of Greensand stretches across the county from the neighbourhood 

 of Swindon in the north-east to Warminster in the west, and 

 separates the north-western third containing the Oolites, from the 

 Cbalk, which chiefly constitutes the remainder. The Oolites are 

 also exposed in a triangular area in the south-west around Mere 

 and Tisbury. Tertiary strata occur in patches near Bedwyn and 

 Savernake in the north-east, south-east of Salisbury (around West 

 Grimstead), and in the extreme south near Cranborne. , There are 

 Quaternary Gravels in the Avon Valley near Salisbury. The 

 county is well watered ; the Kennet flows through the Marlborough 

 Plain to join the Thames at Heading ; the Somerset Avon drains 

 the Oolites of the north-west, whilst the Hampshire Avon passes 

 from north to south through Salisbury Plain, from near Devizes 



