JOURNAL OF CONCHOLOGY, 289 



A LIST OF THE LAND AND FRESHWATER MOLLUSCA 

 OBSERVED IN THE NEIGHBOURHOOD OF BEVERLEY. 



By J. D. BUTTERELL. 



The following list of localities, compiled from rough notes 

 taken during the past two or three years, must not by any means 

 be considered an exhaustive onC; as there is no doubt that by 

 careful research and comparison of the specimens, a fair number 

 of varieties and species may be added. Broadly speaking, the 

 district examined is contained within a circle having a radius of 

 five miles with the town of Beverley as its centre. The country 

 is well wooded and numerous plantations occur. The four free 

 pastures — Westwood, Hurn, Figham and Swinemoor, with an area 

 of nearly 1200 acres — are good hunting grounds. Westwood is 

 dotted over with a number of disused chalk-quarries now covered 

 with a growth of fine old hawthorns. As habitats for the fresh- 

 water species we have the River Hull, Leven Canal three miles in 

 length, Beverley and Barmston Drain, Leckonfield Moat surround- 

 ing the site of Leckonfield Castle, and an infinite number of 

 ponds, drains and ditches; the latter, unfortunately for the 

 conchologist, are kept so rigorously clean by the authorities that 

 many species are unable to attain maturity, and some, notably 

 Lim/ma siagnalis, are almost extinct. Geologically, Beverley is 

 situated on the Holderness Drift at the edge of the Chalk Wolds; 

 the Chalk crops out at Beverley, and may be said to be the 

 foundation on which rests the drift. The surface soil is a stiff 

 clay and this overlies a blueish clay, both of which stretch over 

 the whole of Holderness. A section of 50 feet made by boring 

 for the New Alexandra Dock at Hull gives the following, and 

 probably not much difference would be found in certain spots in 

 the radius given. 



