324 MILNE AND OLDHAM : MOLLUSCA OF BOWDON DISTRICT. 



Anodonta cygnea. " In the ponds at Dunham" (Dyson) ; 

 "Especially fine and abundant at Lymm" (Melvill). We can 

 verify the latter record, and add Ringway, Ashley, Arden, 

 Wythenshawe, Baguley Brook, Rostherne, and Mere. 

 There is considerable variation among the shells — those 

 from Arden approaching v. radiaia, those from Ashley 

 V. pallida. 



A. cygnea var. incrassata. Hampson's Pit, where it is 

 very fine; Brooklands, Northen Etchells. 



A. cygnea var. zellensis. Hampson's Pit, Baguley Moor, 

 Over Tabley. 



A. anatina. Very plentiful in some years in Rostherne Brook, 

 in others not to be found ; the supply probably comes from 

 the Mere. 



Sphasrium corneum. Very common, and showing con- 

 siderable variety. 



S. corneum var. pisidioides Gray. Pond, Rostherne. 



S. lacustre. Occurs at BoUington, Dunham, Baguley, Peel- 

 causeway, Sale, and Northen Etchells. 

 S. lacustre var. brochoniana. Hampson's Pit. 

 S. lacustre var. ryckholtii. Ashley and Booth Bank. 



Pisidium amnicum. Rostherne Brook and River Birkin, 



Caldwell Brook, Brooklands, Mobberley. 

 P. fontinale. "In the ponds on Baguley Moor" (Dyson). It 



is still found here, and also at Hampson's Pit, Sale 



Meadows, Ashton, Sale Moor, Brownlow Green, Agden, 



Mere, Rostherne Brook, and Mobberley. 

 P. fontinale var. henslowana. "Pits on Cheshire side of 



Mersey, and in a pit on Hale Moss" (Hardy). We find it 



at Mere, Brooklands, Heyhead, and Hampson's Pit, where 



it grows to a size of 5 x 6 mm. 

 P. fontinale var. pulchella. In a pond at Brownlow Green. 

 P. pusillum. Found almost everywhere, and very variable. 



J.C., vii., Jan. 1894 



