Oldham : Cheshire Lima ana Fresh-water Mollusca, 



259 



LimncBa aiiricidaria (L.). Middlewood (C. H. Moore, ' J. of 

 C:, vol. X., p. 336). Brereton! (CO.). 



LimncBa auric id aria v. acuta Jeff. Marbury Mere, near 

 Northwich, August, 1905 ! (CO.). 



LimncBa pereger (Miill.). v. maritima Jeff. Leasowe (R. 

 Standen, ' J. of C', vol. x,. p. 258). 



LimncBa stagnalis (L.) v. fragilis L. Marbury, near North- 

 wich (B.R.L., ' J. of C, vol. ix., p. 151). 



Limncea stagnalis m. scalariforme. Cranage ! (H.G.B.). 



Limncea glabra (Miill.). Knutsford ! Comberbach ! Middle- 

 wich ! (B.R.L.). Antrobus ! Romiley ! Lindow ! Lower Peover ! 

 {CO.). 



Planorbis corneus (L.). Abundant in ponds near Chester, 

 where it was introduced in the early ' eighties,' 1901 ! (R. New- 

 stead). Alderley Edge ! (H.G.B.). Peak Forest Canal, Marple, 

 April, 1896 ! Booth's Mere, Knutsford, May, 1901 ! (CO.). 

 There is no reason to think that this species is indigenous in 

 Cheshire. 



*Planorbis dilatatus Gould. A few in the Peak Forest 

 Canal, Dukinfield, November, 1900 and March, 1901 ! (CO.). 



Fam. Physid^. 



*Physa heterostropha Say. Shropshire Union Canal, Chester, 

 January, 1898 ! Trent and Mersey Canal, Sandbach, November, 

 1900 ! (B.R.L., ' J. of C, vol. X., p. 34). Abundant in the Peak 

 Forest Canal, Dukinfield, November, 1900 ! (CO.). 



Aplecta hypnorum (L.). Cranage ! (H.G.B.). Romiley ! 

 Lindow ! Lower Peovei ! (CO.). 



Fam. Paludestrinid^. • 

 *Paludestrina jenkinsi (Smith). The species was first 

 obtained in Cheshire by Mr. B. R. Lucas, who collected speci- 

 mens in the Trent and Mersey Canal, at Middlewich, in August, 

 1899 ! In September, 1900, I took it in the Shropshire Union 

 Canal, near Beeston Castle Station ! in the Trent and Mersey 

 Canal, near Sandbach ! and in the Peak Forest Canal, at Dukin- 

 field ! C J. of C, vol. X., p. 42). It has since been found in the 

 Shropshire Union Canal, at Chester, 1903 ! (B.R.L.), in a small 

 reservoir formed by draining the Cogshall Brook, near North- 

 wich, March, 1903 ! (CO.), in the Peak Forest Canal at Marple", 

 April, 1904 ! (F. Taylor), and in Marbury Mere,_near Northwich, 

 July, 1904 ! (CO.). P. jenkinsi has now obtained a firm footing 

 m our waterways, and we may expect that so pushful and 



J908 July I. 



