150 



N. TUBEROSISSIMA. P.p. 320. NERITA T. 

 Sup. p. 150. t. 29. /. 5. Pellucid, white, whorls four, 

 marked with four spiral broken tubercular ridges, the 

 upper volutions small; umbilicus large, i. Dunbar, 

 very rare. 



N. INTRICATA. F. p. 319. NERITA I. Don. t. 

 167. N. CANRENA. Mont. Sup. p. 148. N. CAN- 

 RENA. VAR. M. D.p. 978. Smooth, livid, with bands 

 of sagittate ferruginous lines ; umbilicus large and fur- 

 nished with two spiral ridges and two grooves. \. 

 Weymouth, rare. 



N. PALLIDULA. F. p. 320' NERITA P. Don. t. 

 16. f. 1. Mont. p. 468. D.p. 986. J)a Cos. t. 4. 

 /. 4. TURBO PALLIDUS. Turt. D.p. 192. LACUNA 

 P. Turt. in Z. J. 3. p. 190. Smooth, thin, subpel- 

 lucid, brownish yellow, depressed, but three whorls, 

 the last extremely large, pillar lip white with a very 

 wide groove leading to the deep umbilicus ; outer lip 

 very effuse. i...f . On sea-weeds at low water mark, 

 common. 



N. LACUNA. F. p. 320. HELIX L. Mont. p. 428. 

 1. 13. /. 6. D.p. 917. Lin. T. S.p. 201. TURBO 

 L. Turt. D.p, 193. t. 25. / 87, 89. LACUNA MON- 

 TACUTI. Turt. in Z. J. 3. p. 191. Thin, pellucid. 



