l6o R. STANDEN : LAND AND FRESHWATER MOLLUSCA. 



this to be the case, I was induced to examine the reservoir at 

 Beswick, and was much surprised to discover that the embank- 

 ment stones at about three feet deep were literally covered with 

 them ' (Dyson's List, 1850). 



In Hardy's and Dyson's localities ; often eroded ; all small. 

 Canal at Hatherlow (R.D.D.). 

 Iferitina fluviatilis L. Common and very fine on sides of canal 

 bridge at Newsham, near Preston. 



' Very common in the river Lune at Lancaster. In a kind of 

 by-wash at the end of Lady's-walk, near the town, there is an 

 embankment, where these shells adhere to the stones, the water 

 flowing over them. Here the collector may walk upon the dry 

 stones and gather them with ease. Some five miles up the river 

 rather finer specimens are found upon the stones at the bottom 

 of the stream, which is only about two feet deep ', (Dyson's List, 

 1850). 



Paliidina contecta Mill. Very abundant and fine in ponds at Birch, 

 and main drains, Southport. Fairly plentiful at Rufford. Occurs 

 in canal at Rosegrove (F.C.L.). 



Now not uncommon in many pits near Manchester, in every 

 case probably introduced (T.R.). 



' Canals, pits, etc.; general throughout the district, but not 

 common ' (Hardy's List, 1865). 



There was a great rush to Southport in 1844-46, and many 

 were colonised by collectors and dealers (to my knowledge) in 

 canals near Manchester, at Twenty Pits, Greenheys, and cotton 

 pits, Chorlton. Dyson's Southport shells were certainly/^. cofitecta, 

 and not/', vivipara (R.D.D.). 

 Paludina vivipara L. A few at Rufford, and in main drains behind 

 Southport. Several specimens were taken at Birch in company 

 with P.. contecta, all probably introductions. 



' Canal at Reddish, near Brookbank ' (Hardy's List, 1865). 

 Bythinia tentaculata L. Abundant in canals at Tarleton, Bedford- 

 Leigh, Newsham, Clifton, and Burnley (F.C.L.) ; and in ponds 

 at Grimsargh, Prestwich, Eccles, Crossens, and many other 

 localities. From Grimsargh and Newsham it is beautifully clean, 

 but very small. From most of the other localities it is generally 

 very much eroded, and thickly covered with an incrustation. 



' Canals, pits, and streams. Abundant in many places ' 

 (Hardy's List, 1865). 



'In two pits in Chorlton Lane, and in the pits on Hey wood's 

 Farm, Moss Lane. Found in thousands in the main drains near 

 Southport, and in the ditches on Freckleton Marsh, where the 



Naturalist, 



5 uKi laa? 



