I 



90 THE ELEMENTS 



DIVISION SECOND. 



Shells without a regular spire. 



Genus 32nd.~ PATELLA. Animal 

 a Limax ; shell univalve, subconic, 

 shaped like a bason ; without a spire. 

 Linn. Syst. 331. Plate 9th, Kg. 32. 



Linne divides this genus into five 

 families : *Labiata?, &c. furnished with 

 an internal lip ; shell entire ; **Den- 

 tatse, &c. with the margin angular or 

 irregularly toothed ; # * # Mucronata3, 

 &c. with a pointed recurved tip or 

 crown ; *** # Integerrima?, &c. very 

 entire, and not pointed at the tip 

 or vertex ; *** ## Perforata?, &c, with the 

 crown perforated. 



Habitation. This tribe of shells 

 have been found to inhabit the sea, 

 lakes, and rivers. Those of the sea 

 in general adhere to rocks and stones 



