DEAN : LAND AND FRESHWATER SHELLS OF MORECAMBE AND DISTRICT. 47 



I Stripped and entered, and by placing the eye near tine surface saw 

 the shells distinctly, and gathered them with ease. . . ." Several 

 conchologists have visited this locality within recent years, and have 

 found the shell equally abundant. 



van sinuata Lamarck.— The prevailing form, 

 var. roissyi Michaud. — -Taken sparingly (J.W.J.). 

 Anodonta cygnea L. — Common in the canal throughout the 

 Lancaster area. Also at Dixon's Hole, Caton (R.S.), 1887. 



var. anatina L. — Frequent in the canal ; Dixon's Hole, Caton. 

 Sphaerium corneum L. — Very common in the canal ; April 

 to May. 



var. flavescens Macgillivray. — Common with above. 

 Fossil at Haweswater, Silverdale. 

 S. lacustre Mliller. — Very fine specimens can be taken in the 

 Lady's Walk ditch ; August. 



var. ryckholti Normand. — Very common in a pond on the 

 Marsh, near Lancaster ; also at Conder Green in a pond on the 

 Galgate Road. 



Pisidium amnicum Miiller. — Local in the canal ; in the river 

 Lune above the aqueduct (David Dyson), and at Caton ; Dixon's 

 Hole, Caton (R.S.), 1887. 



P. henslowianum Sheppard. — Common in the canal at Lan- 

 caster (J. VV. Jackson). 



P. subtruncatum Malm. — Common in the canal at the aque- 

 duct ; also in the Lady's Walk ditch, Lancaster; March. 



P. pulchellum Jenyns. — Fossil at Haweswater, Silverdale. 

 P. pusillum Gmelin. — Common in many of the ditches ; Burrow 

 Heights, Lady's Walk; above Halton on the Slyne Road; in the 

 canal ; also at Haweswater. 



var. grandis Adams. — One specimen at Lady's Walk (J.W.J. ). 



Fossil at Haweswater. 



P. nitidum Jenyns. — Exceedingly fine at a ditch near the Burrow 



Heights, Scotfoith, Lancaster, and also in the ditch which connects 



Little Haweswater with the larger tarn. Specimens average five mm. 



broad ; May and June. 



var. splendens Moquin-Tandon. — Haweswater, as above given. 

 Fossil at Haweswater, and at Hale Moss, Burton. 

 P. obtusale Pfeiffer. — Common at Haweswater with above. 



Fossil at Haweswater, and at Hale Moss. 

 P. gassiesianum Dupuy. — Common at Haweswater with above ; 

 occurs also at the aqueduct, near Lancaster, in the canal ; June. 

 Fossil at Haweswater. 



