155 



LANCASHIRE LAND AND FRESHWATER MOLLUSCA. 



STANDEN, M.C.S., 



SzvtnfoH, 7ifar Man'chester. 



I CORDIALLY agree with Mr. Geo. Roberts in his remarks in the 

 number of this Journal for June 1886, as to the desirabihty of a fuller 

 account of the MoUusca of the county being compiled than has hitherto 

 been published. I feel sure if all our Lancashire conchologists would 

 set to work witli a will, and give us the results of their investigations, 

 our knowledge of the Molluscan Fauna of this large county would be 

 considerably increased. Mr. Dyson's work on the 'Shells of the 

 Manchester District ' (published 1850) is a capital little manual in 

 its way, but in relation to the whole of the county his details of 

 local distribution are of necessity somewhat incomplete, and very 

 many of the localities he gives have been blotted out by the encroach- 

 ments of the builder and other causes. The co-operation of con- 

 chologists in working remote or little known localities is to be desired, 

 and would certainly lead to tangible results. 



In conjunction with my friend, Mr. W. H. Heathcote, of Preston, 

 we are endeavouring to become more fully acquainted with the Land 

 and Freshwater Shells of North, South, and West Lancashire, and so 

 far we have ascertained several localities, not given in Dyson's List, for 

 some of the rarer species and varieties. Mr. F. C. Long, of Burnley, 

 has kindly placed in my hands his list of Shells collected in East 

 Lancashire, and sent me specimens of the various species collected 

 by him : while Messrs. R. D. Darbishire and T. Rogers, of Manchester, 

 and others, have also very willingly placed their notes and observa- 

 tions at my disposal, and I am indebted to these gentlemen for the 

 valuable assistance they have rendered in helping to make the list 

 more complete. Quotations and localities copied from their lists are 

 indicated by their initials immediately following. I have also added 

 extracts from Mr. David Dyson's List of 1850, and from that com- 

 piled by Mr. John Hardy in 1865. 



With one or two exceptions, every locality given — other than 

 those copied from the above-named lists — has been visited by myself 

 and Mr. Heathcote in company during the past three years, and we 

 have to acknowledge the kind aid of Messrs. J. W. Taylor, T. D. A. 

 and S. C. Cockerell, F. G. Fenn, and B. Tomlin, in determining 

 varieties of which we were somewhat doubtful. 



May 1887. 



