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SCALID.E. 



Sub-gen. onisoidia, Swaiusou. 



Shell cancellated ; spire acuminated ; inner lip widely spread 

 over the body-whorl, and granulated ; outer lip thickened and 

 denticulate. 



cancellatum, Sow. grande, A. Adams. 



Dennisoni, Reeve. Strombiforme, Eeeve. 



exq^uisitum, Adams and Reeve. 



Fam. SCALID.E. 



Lingual riband with no central denticles, but with 

 transverse rows of teeth formed of unguicular, simple un- 

 cini or laterals. Tentacles subulate, with the eyes on the 

 outer side of their bases. Mantle enclosed, with a rudi- 

 mentary siphonal fold. Foot obtusely triangular, grooved 

 below, furnished in front with a fold or mentum. 



Operculum horny, spiral, of few whorls. 



Shell spiral, turreted, variced; aperture entire, without 

 any notch or canal. 



The animals in this family are predaceous, and their 

 shells, for the most part of a white colour, are remarkable 

 for the extreme elegance of their form and dehcacy of 

 sculpture. 



Genus scala, Klein. 



Shell usually pure white, solid, lustrous, turreted, 

 many-whorled ; whorls convex, sometimes separated, 

 ornamented with numerous longitudinal ribs; aperture 

 round, peristome continuous, thickened. 



Syn. Scalarus, Monlf. Scalaria, Lam. Aciouc, 



