148 



young and with bands of spots and streaks ; whorls six, 

 the body whorl very large and ventricose, the others 

 small in proportion ; rounded, produced and somewhat 

 lateral; aperture suboval, sublunate; outer lip rather 

 thin and even ; pillar lip rather thick and reflected, 

 forming a large and deep umbilicus; operculum horny. 

 1. Common on sandy shores. 



N. RUFA. F.p. 319. NERITA R. Mont. Sup. 150. 

 t. 30. /. 3. Smooth, purplish, with a white band 

 round the top of the volutions and two others on the 

 body whorl ; pillar lip forming a large projection over 

 the cavity behind and producing an indentation on each 

 side of it. . England and Scotland, rare. Second 

 whorl proportionally larger than in the preceding. 



N. NITIDA. F.p. 319. NERITA N. Don. t. 144. 

 Mont. Sup. p. 149. N. MAMMILLA. VAR. C.D.p. 



985. Glossy, white, the spire short; whorls five, 

 nearly flat, the suture nearly obliterated; umbilicus 

 half closed, i. Diffused but rare. 



N. ALDERI. Forbes in Malac.Monens. p. 31. t. 2. 

 /. 6,7. An N. VALENCIENNESI ? Payr. t. 5./. 23,4. 

 Spire produced, of five whorls, divided by a shallow 

 suture, body whorl largest and rounded, the upper ones 



