Zool. Soc. 1857. Swainsoni, _Dohrn_, Proc. Zo. Soc. 1857. nodulosus, _Dohrn_, Proc. Zo. Soc. 1857. Paludomus (_Tanalia_). loricatus, _Reeve_, Conch. Icon. erinaceus, _Reeve_, Proc. Zool. Soc. 1852. æreus, _Reeve_, Proc. Zool. Soc. 1852. Layardi, _Reeve_, Proc. Zool. Soc. 1852. undatus, _Reeve_, Conch. Icon. Gardneri, _Reeve_, Conch. Icon. Tennentii, _Reeve_, Conch. Icon. Reevei, _Layard_, Proc. Zool. Soc. 1854. violaceus, _Layard_, Proc. Zool. Soc. 1854. similis, _Layard_, Proc. Zool. Soc. 1854. funiculatus, _Layard_, Pr. Z. Soc. 1854. Paludomus (_Philopotamis_). sulcatus, _Reeve_, Conch. Icon. regalis, _Layard_, Proc. Zool. Soc. 1854. Thwaitesii, _Layard_, P. Zool. Soc. 1854. Pirena atra, _Linn._ Systema Naturæ. Paludina melanostoma, _Bens._ Ceylanica, _Dohrn_, Pr. Zool. Soc. 1857. Bythinia stenothyroides, _Dohrn_, Proc. Zool. Soc. 1857. modesta, _Dohrn_, MS. inconspicua, _Dohrn_, Pr. Zool. Soc. 1857. Ampullaria Layardi, _Reeve_, Conch. Icon. moesta, _Reeve_, Conch. Icon. cinerea, _Reeve_, Conch. Icon. Woodwardi, _Dohrn_, Pr. Zool. Soc. 1858. Tischbeini, _Dohrn_, Proc. Zool. Soc. 1858. carinata, _Swainson_, Zool. Illus. ser. 2. paludinoides, Cat. _Cristofori & Jan._[2] Malabarica, _Philippi_, monog. Ampul.[2] Luzonica, _Reeve_, Conch. Icon.[2] Sumatrensis, _Philippi_, monog. Ampul.[2] Navicella eximia, _Reeve_, Conch. Icon. reticulata, _Reeve_, Conch. Icon. Livesayi, _Dohrn_, Proc. Zool. Soc. 1858. squamata, _Dohrn_, Proc. Zool. Soc. 1858. depressa, _Lam._ Anim. s. Vert. Neritina crepidularia, _Lam._ Anim. s. Vert. melanostoma, _Trosch._ W.A. Nat. 1837. triserialis, _Sowerby_, Conch. Illustr. Colombaria, _Recluz_, Pr. Zool. Soc. 1845. Perottetiana, _Recluz_, Rev. Z. Cuv. 1841. Ceylanensis, _Recluz_, Mag. Conch. 1851. Layardi, _Reeve_, Conch. Icon. rostrata, _Reeve_, Conch. Icon. reticulata, _Sowerby_, Conch. Illustr. Nerita plicata, _Linn._ Systema Naturæ. costata, _Chemn._ Conch. Cab. plexa, _Chemn._ Conch. Cab.[3] Natica aurantia, _Lam._ Anim. s. Vert. mammilla, _Linn._ Systema Naturæ. picta, _Reeve_, (as of _Recluz_), C. Icon. arachnoidea, _Gm._ Systema Naturæ. lineata, _Lam._ Anim. s. Vert. [Footnote 1: M. fasciolata, _Olivier_.] [Footnote 2: These four species are included on the authority of Mr. Dohrn.] [Footnote 3: N. exuvia, _Lam._ not _Linn._]