4 



THE BRITISH NATURALIST. 



^January 



Nottingham Naturalists' Society's Report, their paper on " Local 

 Land and Fresh-water Shells." On his departure for the Antipodes, my 

 friend, Mr. C. T. Musson, presented me with the volumes containing 

 Ins collecting notes, embodying the results of many years diligent 

 searching in all parts of the county ; from these and the publications 

 previously mentioned 1 shall draw largely in the following com- 

 pilation. 



AQUATIC. 



Class Cone hifer a. Order Lamellibranchiata. 



Genus Sph;erium, Scop. (= Cyclas, Brugiere). 



Syhcerium contemn, L. — This species is very widely diffused in 

 rivers, lakes, ponds, canals, and ditches, often found in large numbers. 



Yar. Jlavescens, McGill. — Near Beeston, Lowe. 



Var. nucleus, Stud. — Mentioned on the authority of Mr, Lowe as 

 occuring in Musco Sic Brook. 



Yar. pisidoides, Gray.-— Canal at Beeston, Lowe. 



Var. scaldiana, Norm.— Lake at Clumber. . L found very large 

 numbers of this variety in the niters, many of the shells were deformed, 

 evidently from the pressure of the closely packed mass. 



Sphatrium rivicola, Leach. — This species abounds in the river Trent' 

 and in the canals. 



Spharium pallidum, Gray, (= S. ovale, Jeff); — Ha s been recorded 

 from Beeston by Mr. Lowe. Mr. Musson adds a note " Trent, at 



Beeston." : • : •-. ■ : • 



Sphcerium hicustre, Mull.— Generally distributed and plentiful, in 

 ponds, etc. 'A ■ ' ' 



Var. Bvochoiiiana, Bourg. — Attenboro' and the backwater at 

 Beeston, Mr. Lowe. Mr. Musson and myself found it in the lake in 

 Clumber Park, a locality mentioned by Rimmer (" Land and Fresh- 

 water Shells ") some years ago, but the examples were poor. On a 

 more recent visit, I failed to get any but dead shells. The fines 

 examples I have seen of this variety were taken at Marham, by a 

 friend, from a portion of the river Trent, which is protected from the 

 current by a narrow strip of land forming a peninsula ; this piece of 

 water has also yielded large numbers of shells of other species, and of 

 fresh-water sponges. 



Genus Pisidium, Pfr. 



Pisidium amnicum, Mull. — Common in canals and rivers. " : I 

 Pisidium fontinale, Drap - Common and widely distributed 



throughout the county. 



Var. Hcnslowiana, Shepp.— Found in many localities in small 

 numbers. 



