26o Oldhaiii : Cheshire Land and Fresh-water Molhisca. 



prolific a colonist will before long be one of the most widely- 

 spread and abundant species in the county. 



Paludestrina jenkinsi v. carinata Smith. Trent and Mersey 

 Canal, Sandbach, 1900 ! (CO.). Shropshire Union Canal, Ches- 

 ter, 1903 ! (B.R.L.). Trent and Mersey Canal, Lach Dennis, 

 1903 ! (CO.). 



"^Paludestrina taylori Smith. This alien species was des- 

 cribed by Mr. E. A. Smith in the ' Annals and Magazine of 

 Natural History ' (1901, p. 191) from specimens obtained by 

 Mr. F. Ta\dor in the Peak Forest Canal at Dukinfield, in Sep- 

 tember, 1900. In April of that year Mr. Taylor had collected 

 specimens in the Canal at Droylesden, Lancashire, a few miles 

 from Dukinfield, and connected with that place by water. He 

 found it subsequently at several places in the Canal between 

 Dukinfield and Hyde, where, judging by its abundance — I took 

 hundreds of specimens in a bed of Glyceria aquatica at Dukin- 

 field in September, 1900 — it had been established for some time, 

 but of its native habitat and the manner in which it reached 

 this country nothing is known. An interesting account of 

 its life-history and reproduction is given by Messrs. Jackson 

 and Taylor, in the ' J. of C, vol. xi., pp. 9-11. 



Fam. ViviPARiD^. 

 Vivipara contecta (Millet). Pond, Alderley Edge ! (H.G.B.). 

 Not indigenous in Cheshire. 



Fam. Valvatid^. 



Valvata piscinalis (Miill.) v. antiqua Sow. Marbury Mere, 

 near Northwich, July, 1904 ! (CO.). 



Valvata piscinalis m. sinistrorsum. A reversed example 

 from Marbury Mere, near Northwich, 1905, was exhibited by 

 Mr. B. R. Lucas at the Annual Meeting of the Conchological 

 Society for that year ! (' J. of C, vol. xi., p. 268). 



Valvata cristata Miill. Middlewich ! (B.R.L.). Tabley Pool, 

 1903 ! Witton Flashes, near Northwich, 1903 ! (CO.). 



PELECYPODA. 



Fam. Dreissensiid^. 

 Dreissensia polymorpha (Pallas). Shropshire Union Canal, 

 BeestonXastle, September, 1900 ! (CO.). 



Fam. Unionid^. 

 Unio pictonim (L.). Shropshire Union Canal, Beeston 



Naturalist, 



