NERITA. 51 



/2J9 flattened, septiform, acute, and frequently 

 dentated or crenated on the inner edge of the 

 lip ; outer lip obtuse, and often provided inter- 

 nally with teeth, 



N. ExuviA. Thick^ white, spotted with black, 

 with transverse acute squamulated ribs, and 

 longitudinal striae decussating them ; outer lip 

 crenate within ; inner lip verrucose above, and 

 the margin toothed; columella spotted with 

 yellow in its upper part; diam. \\. W. 36. 

 49. 



N. PELERONTA. Thickish, transversely fur- 

 rowed, ash or reddish yellow, with longitudinal 

 black or rose - colour flexuous streaks ; mouth 

 white ; inner lip with two teeth, and a saifron or 

 blood-coloured spot in the middle ; outer lip smooth 

 within in the centre, but with a tooth or two on 

 the sides; diam. 1^. W. 36. 46. 



N. POLiTA. Thick, glabrous, shining, slightly 

 striolate longitudinally ; colours various ; spire 

 extremely blunt ; inner lip smooth, polished, and 

 dentated ; outer lip slightly crenulated, yellowish 

 within; diam. IJ. W. 36. 39. 



N. ALBiCELLA. Solid, compressed at the 

 sides, and girded with broad flattish furrows ; 

 whitish, with irregular black or dark brown spots, 

 bands, or clouds, or sometimes blackish, with 

 white spots ; spire lateral, obsolete, and flat ; lips 



