igz C N C H O L O G Y 



feft Shells ; and the Cedo NuUi is fo ex-* 

 tremely rare and beautiful, that it is now 

 rated at the prodigious fum of one hun- 

 dred guineas, PI. V. fig. 3, 8, and 9, are 

 Volutes. 



The Volutes are Shells of a pyramidi* 

 cal or conic {hape, for the bafe is flat and 

 wide, and the body rifes gradually into a 

 fharp point at the top. The turban is 

 the bafe, and all the whirles are diftin- 

 guiftied by flight linear prominences: fome 

 kinds have this bafe quite flat, or a perfect 

 Helix, as PI. V. fig. 9. In others it prolongs 

 into a fliarp clavicle, as in the Imperial 

 Crown, the Fleabite, the Flamboyante, 

 as in PI. V. fig. 3 and 8. However, thefc 

 differences of the turban or clavicle are not 

 efi'ential enough to caufe a fubdivifion into 

 different genera ; though Davila's fecond 

 genus of Volutes, he calls Rouleaux, is 

 formed on thefe differences. 



Th 



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