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under mofs : and have found great abundance, amongfl a 

 varietyoffliells brought down by the floods in the river Avon 

 at Lackham in Wiltjliire. Thefe are fuperior in fize to tliofc 

 from Kent, but of courfe dead ihells though perfeft. 



ScHROETER was at a lofs whetlierto place tliis amorgfl 

 his land or frefli-water fliells, and has therefore given it a 

 place both in liis FluJJconchylicn and Erdconchylien ; and 

 what is extraordinary, has affixed to it the fynonyms of 

 Helix oBona, notwithftanding he exprefsly fays, it does 

 not anfwer to the defcription of the LinncEan fliell, as it 

 neither has Zifub-umbilicus, or roundifh mouth. 



MuLLERhas committed the fame error, and has equally 

 quoted Gualteri's figure; which is a minute fpecies, 

 and not the leaft correfponding with the Linnccan defcrip- 

 tion of H. oElona, 



Gmelin has continued the error of thofe authors, not 

 having been acquainted with the fliell in queilion ; and, 

 in order to correfpond with their defcripticns, tells us it 

 has fometimcsfix fpires, the firfl twice as large as the next; 

 and the umbilicus inconfpicuous. This, though it accords 

 partly with Schroeter's and Muller's fhell, certainly 

 does not correfpond with, " tcjla fubperforata turrita : 

 anfra6libus oElo, apertura fubrotunda," the fpecific cha- 

 rafters given by Linn.eus to his H. oElona. 



That GuALTERi fhould make this an aquatic, is not 

 furprifmg, as all our land-fhells are occafionaliy carried 



K k into 



