458 



Da Costa, as well as Doflor Pulteney, has fallen 

 into an error in quoting the H. complanata of Linnaeus 

 for this fliell : and the lad author is equally miftaken, in 

 confidering the chefnut-coloured variety of this fpecies 

 to be the H. paludofa of Da Costa. It is at once dif- 

 tinguidied from any of the Helices with a deprelfed apex, 

 by its thicknefs in proportion to its fize; and particu- 

 larly by the Angularly large, and fpirally formed 

 umbilicus. 



There can be no doubt this is tlie H. contorta of Lin- 

 naeus ; Chemnitz has given a very good figure of it for 

 that (hell, which Gmelin quotes : Muller and Schro- 

 ETER have alfo confidered it as fuch. 



It is rather a local fpecies ; but we have found it not 



uncommon in the river Avon, about Lackham in Wilt- 



Jliire after floods ; having been fwept from the ditches in 



the neighbouring meadows, where it is found alive in 



abundance. 



Is common alfo in the ditches in the ifle o^ Purbeck 

 near Warekam, and at Charmouth in Dorjctfiire. 



We have alfo received it from Kent. 



Animal dufky, with two long and very flender, fili- 

 form tentacular with the eyes placed at their bafe. 



Helix 



