33 

 Sphaerium COrneum, L. Treuholme Bar (J. H.). 



SphaBPium (Musculium), lacustre, Miill. Acklam, very 

 fine (B. R. L.). 



Pisidium amnicum, Miill. Tocketts Stream (B. R. L.), 



Pisidium fontinale, Drap. Ingleby Greenhow (J. H.). 



Pisidium pusillum, Gmel. Near Orniesby (T. A. L.), 

 Acklam (T. A. L.), Mulgrave (W. D. R.). 



Pisidium roseum, Scholtz. Hutton Rudby (B. R. L.). 



Donax vittatUS, Da Cos. Redcar (D. F.) (J. H ), Salt- 

 burn, common (M. L. T. ). 



Psammobia ferPOensiS, Chemn. " From deep water in a 

 living state ; occasionally found on the sands " (D. F.) 

 (W. C. H.). 



Solen (Ensis) Siliqua, L. Ferguson says that this species, 

 together with the two which follow, is " common on 

 Coatham Sands, near Marsh House, Avhere they live in 

 the sand about low water mark, and are much sought 

 after by the fishermen, as being a tempting bait for 

 fish." Redcar (J. H.), Saltburn (J. H.) 



Solen (Ensis) ensis, L. Redcar (D. F.) (W. C. H.). 



Solen pellucidus, Penn. Redcar (D. F.). 



Mactra SOlida, L. Redcar. " On the Ijeach " (D, F.) 

 (W. C. H.), Tees Mouth, one (M. L. T.). 



var. truncata. Mont. Tees Mouth (M. L. T.). 



var. elliptica. Brown. Off Redcar (D. F.), Tees Mouth 

 (M. L. T.). 



MactPa StultOPUm, L. "Very common on the Coatham 

 Sands, and often thrown up alive after a storm " (D. F.), 

 Redcar (J. H.), Saltburn, common (M. L T.). 



Mactra SUbtPUncata, Da Cos. Redcar. "On the beach" 

 (D. F.) (W. C. H.). Dredged in Tees Mouth (J. H.). 



Lutraria elliptica. Lam. Redcar (J. H.). " So far back as 

 anno 1678 Lister Anim Angl. 171, ad ostium fluminis 

 Tees cojjiosissime reperumtur, and it still occupies a 

 considerable tract of land in its old habitat, the Tees 

 Mouth" (D. F.), Saltburn, common (M. L. T.). 



