VOL. XVII. (2) LAND AND FRESH-WATER MOLLUSCA 177 



A REVISED LIST OF THE 



LAND AND FRESH-WATER MOLLUSCA OF 



GLOUCESTERSHIRE 



BY 



CHARLES UPTON 



{Read February i^th 191 1) 

 [Plate XXV.] 



It is nearly half a century since any essay appeared in the 

 Proceedings of the Club concerning the Land and Fresh-water 

 Mollusca of the county. In vol. iii. (pp. 63-72), there is a list, 

 with notes, by the late John Jones, but since that paper was 

 published the nomenclature has undergone revision and a 

 number of additional species have been found to occur within 

 Ihe county. It therefore seemed desirable that the Proceedings 

 should contain a revised census, showing as nearly as possible 

 the state of our knowledge at the present time. 



In the following list I have given — except in the case of 

 very common forms — Jones' record, from his paper, the names 

 used by him, where they differ from those now in use, being 

 placed within square brackets, while in a few other instances, 

 where other records have been quoted, the name of the 

 recorder, or the authority, has been placed in round brackets. 

 In all cases where no authority for the record is given, the 

 species or variety has been taken by myself. 



Three species enumerated by Jones, namely, Zonites 

 excavatus, Vertigo alpestris, and Planorhis glaber, I have 

 omitted altogether, as I think he was in error, possibly owing 

 to wrong identification, none of these forms having yet, 

 I believe, been found in the county. 



