49. Cerithium palustre, Brug. Dict. n. 19. Lam. Hist. 7 66. Strombus palustris, Gmel. Syst. Nat. 3521. Number 38. Icon. Lister. Conch. t. 836. f. 62. t. 837. f. 63. Seba, 3 t. 50. f. 13. 14. 17-19. Martini Conch. 4 t. 156. f. 1472. 50. Cerithium ebeninum, Brug. Dict. n. 26. Lam. Hist. 7 67. Icon. Chem. Conch. 10 t. 162. f. 1548, 1549. Ency. Meth. t. 442. f. 1. a, b. 51. Cerithium morus, Lam. Hist. 7 75. not Brug. Icon. Lister. t. 1024. f. 90 ? 52. Cerithium lima ? Lam. Hist. 7 77. Brug. Number 33. A broken shell apparently of this species was brought home, but when a more perfect specimen is round, it may prove to be distinct from it. 53. Cerithium perversum ? Lam. Hist. 7 77. 54. Nassa fasciata, n. Buccinum fasciatum, Lam. Hist. 7 271. 55. Nassa suturalis, n. Buccinum suturale, Lam. Hist. 7 269 ? 56. Nassa mutabilis, n. Buccinum mutabile, Gmel. Syst. Nat. 3481. Lam. Hist. 7 269. Icon. List. t. 975. f. 30. Born. t. 9. f. 13. Chemn. Conch. 11 t. 188. f. 1810, 1811. 57. Nassa livida (n.s.) Testa ovato-conica superne transverse plicata basi spiraliter striata purpureo-livida obscure castaneo bifasciata, anfractibus convexiusculis, sutura linea alba notata, labro extus marginato intus sulcato. Icon. -- Shell ovate conical, livid purplish-white, with one or two central, obscure brown, bands; upper whorls bluntly transversely plaited, the rest smooth, livid, except at the front part of the last, just over the groove, where it is spirally striated; the suture distinct (not channelled) marked by a white line; the inner lip distinct, raised, the outer thickened on the outer side, edge sharp, inside grooved; the throat fulvous-brown; axis one inch, diameter half an inch. This shell belongs to the group of Nassa, but will perhaps form a distinct genus intermediate between it and Columbella, characterized by the narrow form of the mouth. It is most nearly allied to N. olivacea, n. (Bucc. olivaceum, Lam.) and N. canaliculata, n. (Bucc. canaliculatum, Lam.) 58. Clavatula striata (n.s.) Testa ovato-lanceolata turrita albida regulariter spiraliter sulcato-striata transverse et interrupte costata, anfractuum margine superiore angulato subnodoso, cauda brevi, fauce sulcata. Icon. -- Shell ovate turreted, whitish-brown, with eleven or twelve longitudinal interrupted ribs forming long tubercles on the centre of the whorls; the whorls with distant impressed spiral lines near the suture, with a rather flattened slightly nodulose band; the mouth rather more than one-third the length of the shell; outer lip thin inside, grooved; tail short, with a linear depression on its columella side; axis ten-twelfths, diameter four-twelfths of an inch. 59. Cassis achatina, var. Lam. Hist. 7 226.