NATICAD^. 125 



Eulimella (Forbes). As Chemnitzia, but tlie 

 shell smooth and polished ; pillar simple. 



E. aciciila. Fig. 193 ; f . 

 affinis. 

 claviila. 

 Scillae. 



Odostomia (Flem.). Shell minute, ovate, or 

 tapering, smooth ; aperture ovate ; pillar with a 

 single fold ; lip thin; operculum indented. Animal 

 like Chemnitzia. 



Family XII. Naticad.^. 



Shell globose, few-whorled ; spire small, obtuse ; 

 apertui-e very large, semicircular ; lip sharp. 

 Animal with a long retractile proboscis ; foot very 

 large ; mantle with large side-lobes, turned up so 

 as to conceal, more or less perfectly, the shell. 



Velutina (Flem.). Shell thin, with a velvety 

 epidermis ; no operculum. Animal with a broad 

 head ; tentacles blunt, far apart ; gills two. 



V. flexilis. 



laevigata. Fig. 195 ; ti. s. 



