LAND AND FRESH-WATER MOLLUSCA OF GREENOCK. 279 



XXVIII. 



NOTES ON THE LAND AND FRESH-WATER MOL- 

 LUSCA OF GREENOCK AND SURROUNDING 

 DISTRICT. 



BY THOMAS SCOTT. 



[Read 29th December, 1885.] 



Nine years ago, when the British Association held 

 its meetings in Glasgow (in 1876), a number of very use- 

 ful lists of species belonging to various groups, both of 

 animals and plants, were prepared; and these form 

 no inconsiderable part of the Fauna and Flora of 

 the West of Scotland, a book which is very useful 

 to all students of Natural History for reference. 

 Among these lists is one of the Land and Fresh- 

 water Mollusca, which includes all the species known 

 to its compiler as occurring in the West of Scotland 

 at that time. 



Through the zeal and energy of variovis workers, 

 our knowledge of the Natural History of the West 

 of Scotland has been considerably increased daring 

 these nine years; and one of the branches which 

 have to some extent been successfully worked up is 

 that of the Land and Fresh-water Mollusca. Not 

 only have new stations been found for the species 

 already known to occur, but several sjDecies and 

 varieties have been added to the list of those pre- 

 viously recorded; and no doubt, as the study of 

 this branch becomes more widely and thoroughly 

 carried out, other additions will yet be made. 

 Accordingly, with the progress made in other 

 branches of Natural History, it will possibly be found 

 that ere long the second edition of the Fauna and 

 Flora, referred to in the i^reface to the first, will be 

 much needed ; and it is to be hoped that this will 

 by-and-by be an accomplished fact. Not only will a 



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