82 THE ELEMENTS 



entire. Linn, Syst. 327. Plate 9tli, 

 %. 28th. 



The shells composing this genus 

 are divided into five families : *Neri- 

 toidei, &c. with the pillar-margin of 

 the aperture dilated and imperforate ; 

 **Solidi, &c. solid and imperforate ; 

 *** Solidi, Slc. solid, perforated ; 

 ****Cancellati, eancellate ; *****Tur- 

 riti, tapering. 



Habitation. The shells of this ge- 

 nus are found to inhabit the sea, land, 

 and fresh water ; the Turbines adhere 

 to rocks near the shore ; and some of 

 them live in very deep water. 



The Turbo Scalaris, or wentle- 

 trap, as it is termed in England, is 

 very much esteemed by collectors, 

 and is rather a scarce shell. A mo- 

 dern author proposes a new genus 

 from this and similar species; and 

 the longitudinal ribs, he marks as 

 the distinguishing characteristics ; al- 

 though we must in candour admit, 



