148 



1(33. Pileolus, J. Sow., 183 ? Desk. Nerita H, Blaine. 1825. Pileolus 

 plicatus. 

 Calana, Gray, 1844. Pileolus, sp. Desh. Pileol. altevelensis. 



Neritellina. 



164. Neritella, Humph. 1797. Neritina, Lam. 1822. Neritine, Lam. 

 1812. Nerita pulligera. 



Neritina, Swains. 1840. Neritella, sp. Humph. N. Meleagris. 

 Theodoxus, M<m(f. 1810. Nereina, Christ. $■ Jans. 1832; not 



Defrance. Neritella, sp. Humph. Neritina, sp. Lam. Ner. 



fluviatilis. 

 Neripteron, Lesson, 1830. Neripterum, Ilerrm. 1847. Neritina 



auriculata, Lam. 

 Clithon, Montf. 1810, 326' ; Swains. 347, 1840. Nerita ft, Schum. 



1817. Neritella, sp. Humph. Cliton, Lesson. Ner. corona. 

 Dostia, Gray, Syn. 1840 ; 1844, 58. Cliton, sp. Lesson. N. cre- 



pidularia. 



165. Catillus, Humph. 1797, 57. Cimber, Montf. 1810, 82. Navi- 

 cella, Lain. 1822. Navicelle, Lam. 1812. Septaria, Feniss., 

 Blainv. 1825. Nerita porcellana. 



Fam. AMPULLARIADiE. 



166. Ampullaria, Lam. 1801. Pomus, Humph, sp. 1779, 58. Po- 

 macea, sp. Perry. Bulimus, sp. Brug. Nerita, sp. Midler. 

 Ampullarius, Montf. 1810. Pacbylabra, Swains. 1840. Pacby- 

 stoma, Guild. 1828; not Swains. Nerita urceus. 



167. Marisa, Gray, 1824. Ceratodes, Guilding, 1828. Planorbis, sp. 

 Midler; Lamk. 1822. Marissa, Menke. Helix cornu arietis. 



168. Pomus, Humph. 1779, 58. Ampullaria, Guild. 1828; Swains. 

 1840. Hel. ampullacea. 



169. Lanistes, Montf. 1810, 122. Helix, sp. Linn. Cyclostoma, sp. 

 Olivier. Helix Bolteniana. 



Lanites, Swains. 1840. Helix guinaica. 



170. ? Meladomus, Swains. 1840. Lanistes, sp. Troschel, 1847. 

 Paludina, sp. Sow. Pal. olivacea, Sow. 



1/1. Pomella 1 Ampullaria, sp. HOrb. Amp. neritoides, HOrb. 



172. Asolene, HOrb. 1837; Gray, 1840. Ampullaroides, UOrb. 

 1838, 379. Helix platse, Maton. 



Fam. IANTHINIDJ5. 



173. Iantbina, Bolten, 1798 ; Lam. 1801. Neritoidea, Humph. 1797, 

 20. Ianthinus, Montf. 1810. lodes, Leach MSS. 1819. Helix 

 Iantbina. 



Fam. ATLANTID,E. 



174. Oxygvrus, Benson, 1835. Ladas, Cantraine, 1839 ; Philippi. 



